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Please, don't try anything that you're about to see us do at home. Ever!

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Really go boom!

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Come on, little buddy, don't burn out! Go, go, go, go!

4
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And Carrie Grant and Tori dip into two more defibrillator mitts.

5
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Will a jump start for your heart burn your bra?

6
00:00:43,000 --> 00:00:44,000
Claire!

7
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Or even cause your piercing to spark?

8
00:00:47,000 --> 00:00:48,000
Ow!

9
00:00:51,000 --> 00:00:53,000
Who are the mythbusters?

10
00:00:53,000 --> 00:00:55,000
I'm so pumped!

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Adam Savage

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Time for science!

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And Jamie Hoderman

14
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Is that beautiful or what?

15
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Between them more than 30 years of special effects experience.

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It bleeds!

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Let's go!

18
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Joining them, Grant Imahara

19
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Don't give up on me now!

20
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Tori Bellegi

21
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So I love my little friend.

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And Carrie Byron

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High explosives and electricity!

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Woo!

25
00:01:20,000 --> 00:01:24,000
They don't just tell the myth, they put them to the test.

26
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We've got another action hero, meth, huh?

27
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We do, and it's really only illustratable by telling a story.

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So, you are in a showdown with the bad guy in.

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You've got the beat on him, but just as you're about to shoot him,

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he jumps into his car and drives away, but...

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You're able to get off one shot into his gas tank, which starts leaking fuel.

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Oh, I love this one, cause I happen to have a lighter in my pocket.

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I light it, I drop it into the trail of fuel, and it races,

34
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catches up with the car, car blows up, bad guy's dead, right?

35
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Exactly that, and we're going to do it.

36
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It's a cinematic cliché.

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Our hero has to stop the escaping bad guy.

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Okay, so action heroes don't usually come with a beret and mustache.

39
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There's the single shot into the gas tank, the leaking trail of gasoline,

40
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the nonchalant flick of a light,

41
00:02:21,000 --> 00:02:27,000
and finally, the fleeing fugitive feels the full force of Hollywood-style justice.

42
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But is this another example of the language of film rewriting the laws of physics?

43
00:02:34,000 --> 00:02:36,000
So how are we going to do this one?

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Are you going to shoot my car while I drive away at high speeds?

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We'll save that for the finale.

46
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I think we need to start small and simple.

47
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Just test what the different fuel types do, you know, how quickly they burn.

48
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Break it down.

49
00:02:47,000 --> 00:02:49,000
That sounds great.

50
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As always, Jamie wants to take the pragmatic approach.

51
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But this look into the future confirms that the small and simple plan

52
00:02:57,000 --> 00:02:59,000
will quite literally go up in flames.

53
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Faster, faster, faster. Everybody out.

54
00:03:01,000 --> 00:03:05,000
And when the story ends with full-scale mayhem,

55
00:03:05,000 --> 00:03:08,000
inevitably it began with bench tests in the bunker.

56
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The basic metric for all of this is figuring out how fast fuel burns from A to B.

57
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So we're basically under slightly safer conditions.

58
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We're going to spray some fuel on the ground, light it,

59
00:03:18,000 --> 00:03:21,000
time how fast it takes to get from A to B.

60
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Three fuels will make up the samples for this first test.

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And gasoline, diesel and jet fuel are the most likely culprits

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to be found causing a conflagration in an action movie.

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Gasoline is first up.

64
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At Adams Square, it's a seven-foot trail onto a smooth metal plate.

65
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Here we go.

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1.7 seconds to go seven feet.

67
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That's fast.

68
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And despite several tests adding more and more gasoline,

69
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that time of one and a half seconds seems to be constant.

70
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1.5 seconds.

71
00:03:56,000 --> 00:03:58,000
Yeah, one and a half seconds.

72
00:03:59,000 --> 00:04:02,000
It's the same whether we use a tiny amount of fuel or a whole lot.

73
00:04:02,000 --> 00:04:05,000
Well, this seems to be a constant in the timing of gasoline.

74
00:04:05,000 --> 00:04:08,000
1.6 seconds. It's really, really steady.

75
00:04:08,000 --> 00:04:11,000
1.5, 1.6. We're within a tenth of a second.

76
00:04:11,000 --> 00:04:13,000
But we're getting a very constant speed

77
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and it doesn't seem to be related to the amount of gasoline we're putting down.

78
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So I think we can extrapolate this out to miles per hour

79
00:04:20,000 --> 00:04:22,000
and start working with it as a bonafide figure.

80
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All right, so we went seven feet and six.

81
00:04:25,000 --> 00:04:27,000
That's 4.6 feet per second.

82
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And we'll go three point three point one seven miles per hour.

83
00:04:31,000 --> 00:04:34,000
That's actually like a reasonable walk speed.

84
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But what about the other fuels?

85
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Diesel's next.

86
00:04:38,000 --> 00:04:40,000
It's not lighting.

87
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But despite liberally applying the blowtorch, it doesn't want to go up in flames.

88
00:04:45,000 --> 00:04:47,000
That's hard stuff to light.

89
00:04:49,000 --> 00:04:51,000
It only lights when it gets mystified.

90
00:04:51,000 --> 00:04:53,000
Next up is jet fuel.

91
00:04:54,000 --> 00:04:56,000
Jet fuel in three, two, one.

92
00:04:56,000 --> 00:05:01,000
And just like the diesel, jet fuel does anything but rock it along the track.

93
00:05:01,000 --> 00:05:03,000
Diesel burn. Diesel burn.

94
00:05:03,000 --> 00:05:05,000
Very similar to diesel fuel.

95
00:05:05,000 --> 00:05:07,000
But the police are coming, so let's wrap up and get out of here.

96
00:05:07,000 --> 00:05:12,000
Okay. The reason that diesel fuel and jet fuel don't burn on the ground is that they're not aerosolized.

97
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They need to be mixed in with the air in a vapor or a mist for them to burn effectively.

98
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Which leaves just one conclusion.

99
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I think it's pretty obvious that of all the things we tested, gasoline is by far the most volatile.

100
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If you're a bad guy, you want to light someone's gas trail on fire and blow up their car,

101
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you better hope they're driving a gasoline powered vehicle, not diesel or jet fuel.

102
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So gasoline's perfect trailblazing properties means it's the fuel of choice going forward.

103
00:05:38,000 --> 00:05:40,000
But where to next?

104
00:05:40,000 --> 00:05:46,000
Well, the mythical action scene in question involves a leaking gas tank as a result of a gunshot.

105
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So to find out how fast fuel falls from a bullet hole, Frank Tabor has answered the call with a veritable ballistic buffet.

106
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Can I fire this one? Can I? Can I? Can I? Do you mind? Do you mind? Is it alright?

107
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Sure, go ahead.

108
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Awesome!

109
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With the gas tank in position at the end of their makeshift gun range, Adam and Jamie are aiming to find out

110
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the size of a .22 caliber bullet hole.

111
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As well as a .44.

112
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I'd round these off, say the .22's like a quarter inch and this is like a .58's.

113
00:06:21,000 --> 00:06:25,000
Absolutely. So shooting the hole was only the first part of this test.

114
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Now I want to know how fast fuel will leak out of the hole that Jamie shot.

115
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So I've got a one liter bottle here, I'm going to let the fuel fall into here, count how many seconds it takes to get to exactly one liter.

116
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Then I'll know how many liters per minute this hole will leak.

117
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So that's just over three liters a minute.

118
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So Adam and Jamie know exactly how quickly fuel flows from a gunshot gas tank and the speed at which a trail of gas burns.

119
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And with that information, it's full scale ahead.

120
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But shooting the gas tank of a car isn't exactly a safe option.

121
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So Adam builds a rig for the back of an old pickup.

122
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I'm going to hang this gas tank off the back of this pickup truck with a steel shield between it and the pickup truck

123
00:07:06,000 --> 00:07:12,000
so that I can experiment with amounts of leaking fuel coming out of this, igniting them and potentially blowing up this gas tank

124
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without hurting the driver of this truck while driving.

125
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Adam and Jamie are all set.

126
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So it's off to the Alameda Naval Base to heat things up.

127
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Next on MythBusters.

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This is the badly one.

129
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Woo!

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Carrie Grant and Tori find out if a shock from a defibrillator will burn your bra.

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Clear.

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Ready.

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Clear.

134
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Is that your defibrillator?

135
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Yeah.

136
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Hey, we've been here before.

137
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Yes, but the fans have a couple more shocking myths that they want cleared up.

138
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Get it shocking cleared?

139
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No, we got it. I'm pretty sure we got it.

140
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Last time the team said...

141
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Everyone clear?

142
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Grant builds his very own defibrillator and then busted the myth that medical nitroglycerin patches can give you a severe case of blown up.

143
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Okay, what do we got this time?

144
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Bra's and nipple rings.

145
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You're a freak.

146
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You might have to explain this one.

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Our unfortunate patient in need of a jump start is either wearing a metal underwire bra or has nipple piercings.

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Oh, and the defibrillator arcs to the metal and they get burnt.

149
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Ouch.

150
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It was bad enough they're having a heart attack. Now they're going to get burnt too.

151
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Well, we're going to find out.

152
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So the fans want to get a pair of parables off their chests.

153
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And the first tail the team is tackling is, will an emergency medical procedure cause a bra burn?

154
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Or is the Browsier a benign bystander?

155
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Using the same ballistic gel torso and homemade defibrillator as last time, our intrepid trio intend to find out.

156
00:09:05,000 --> 00:09:08,000
So they have the equipment and patient.

157
00:09:08,000 --> 00:09:11,000
Now, all they need is a 40 double A bra.

158
00:09:11,000 --> 00:09:14,000
Now, who'd wear a bra that size?

159
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Apparently, I am close to the size of the ballistics dummy.

160
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Therefore, I have to go and shop for a bra.

161
00:09:21,000 --> 00:09:24,000
Once again, making my family proud.

162
00:09:26,000 --> 00:09:28,000
A girl's got to do what a girl's got to do.

163
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Grant, however, is there for fun.

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00:09:31,000 --> 00:09:32,000
I can't look.

165
00:09:32,000 --> 00:09:35,000
I just don't know if these express me.

166
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I think I might want another color.

167
00:09:38,000 --> 00:09:40,000
Calla is not really the issue here, my friend.

168
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It's size.

169
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We don't want it to cut into the ballistics gel.

170
00:09:44,000 --> 00:09:50,000
So maybe we'll get a little bit larger and go from there.

171
00:09:50,000 --> 00:09:52,000
Is this as disturbing as I think it is?

172
00:09:52,000 --> 00:09:55,000
It's even more disturbing than you think it is.

173
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There's no doubt it's disturbing.

174
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There's also no doubt we're going to show you more.

175
00:10:00,000 --> 00:10:02,000
I can't get the same room.

176
00:10:04,000 --> 00:10:08,000
After half an hour of not so wonder bras.

177
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Need some help, big guy?

178
00:10:09,000 --> 00:10:10,000
No. Got it.

179
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I'm coming to prove.

180
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Our odd couple finally make a decision.

181
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This is the fancy one.

182
00:10:17,000 --> 00:10:19,000
I think that's our winner, actually.

183
00:10:19,000 --> 00:10:21,000
Oh, fancy.

184
00:10:21,000 --> 00:10:24,000
I think we got a winner.

185
00:10:27,000 --> 00:10:30,000
Next, Carrie fits our patient with the undergarment.

186
00:10:30,000 --> 00:10:33,000
But despite her best attempt to banish the thought,

187
00:10:33,000 --> 00:10:36,000
she can't help wondering what happened at the bra store.

188
00:10:36,000 --> 00:10:39,000
You didn't take off your shirt, did you?

189
00:10:39,000 --> 00:10:42,000
No way, nuts.

190
00:10:44,000 --> 00:10:45,000
All right.

191
00:10:45,000 --> 00:10:46,000
Do underwire bras conducts.

192
00:10:46,000 --> 00:10:48,000
You got the defibrillator?

193
00:10:48,000 --> 00:10:49,000
Yeah, we got it.

194
00:10:49,000 --> 00:10:50,000
We're in charge.

195
00:10:50,000 --> 00:10:51,000
Okay. This is the scene.

196
00:10:51,000 --> 00:10:53,000
Your heart has stopped.

197
00:10:53,000 --> 00:10:55,000
We're going to do maximum 360 joules.

198
00:10:55,000 --> 00:10:56,000
Let's do it.

199
00:10:56,000 --> 00:10:58,000
The medics in a hurry place their home-made

200
00:10:58,000 --> 00:11:02,000
barbecue tongue defibrillator in the recommended position

201
00:11:02,000 --> 00:11:05,000
and prepare to deliver a life-saving shot.

202
00:11:05,000 --> 00:11:08,000
In three, two, one.

203
00:11:08,000 --> 00:11:10,000
Clear.

204
00:11:12,000 --> 00:11:13,000
Nothing.

205
00:11:13,000 --> 00:11:15,000
We may have saved her life, but we didn't burn her bra.

206
00:11:15,000 --> 00:11:18,000
Clearly, no underwear went up in flames.

207
00:11:18,000 --> 00:11:21,000
So is the burning bra myth busted?

208
00:11:21,000 --> 00:11:23,000
To give it the best chance possible,

209
00:11:23,000 --> 00:11:25,000
do you want to maybe open up the bra a little bit

210
00:11:25,000 --> 00:11:27,000
so that the wire's exposed and you can see what's happening?

211
00:11:27,000 --> 00:11:29,000
Sure. Maybe it was a slightly older bra

212
00:11:29,000 --> 00:11:32,000
and the wire was sticking out.

213
00:11:32,000 --> 00:11:33,000
Yeah.

214
00:11:33,000 --> 00:11:35,000
So it's take two with an unlikely

215
00:11:35,000 --> 00:11:38,000
but conceivable set of circumstances.

216
00:11:38,000 --> 00:11:41,000
In three, two, one.

217
00:11:41,000 --> 00:11:42,000
Clear.

218
00:11:43,000 --> 00:11:45,000
Ooh, a spark flew.

219
00:11:45,000 --> 00:11:46,000
Whoa.

220
00:11:46,000 --> 00:11:48,000
We got a burn.

221
00:11:48,000 --> 00:11:53,000
Yep, the sparks fly and our unlucky patient takes a hot hit.

222
00:11:53,000 --> 00:11:56,000
So what this means for the myth is

223
00:11:56,000 --> 00:11:59,000
if they have the paddles in the wrong position

224
00:11:59,000 --> 00:12:02,000
and you've got a slightly older bra

225
00:12:02,000 --> 00:12:04,000
with some of the metal exposed,

226
00:12:04,000 --> 00:12:09,000
you could be in for a few burns in your tender regions.

227
00:12:09,000 --> 00:12:13,000
The bra didn't burst into flames as some of the stories I'd heard,

228
00:12:13,000 --> 00:12:16,000
but there's an obvious burn on the skin,

229
00:12:16,000 --> 00:12:21,000
so I'd say this one is pretty plausible.

230
00:12:32,000 --> 00:12:37,000
But next, Adam and Jamie's Blazing Trail investigation is smoking.

231
00:12:37,000 --> 00:12:40,000
See you at Stigson here.

232
00:12:45,000 --> 00:12:48,000
Since around the time Jamie started going to the movies

233
00:12:48,000 --> 00:12:50,000
in the early 1900s,

234
00:12:50,000 --> 00:12:54,000
a blazing trail of flammable fuel has been a Hollywood staple.

235
00:12:55,000 --> 00:12:59,000
No action hero's CV would be complete

236
00:12:59,000 --> 00:13:03,000
without a lit fuse of gasoline blowing up the bad guys.

237
00:13:11,000 --> 00:13:14,000
On the trail of this flammable fable,

238
00:13:14,000 --> 00:13:17,000
Jamie and his partner in flame, Adam,

239
00:13:17,000 --> 00:13:20,000
have found that gasoline burns in a contiguous line.

240
00:13:20,000 --> 00:13:25,000
And they know how much and how quickly fuel leaks from a bullet hole.

241
00:13:25,000 --> 00:13:28,000
That's just over three liters a minute.

242
00:13:28,000 --> 00:13:31,000
So on location at the Alameda Naval Base,

243
00:13:31,000 --> 00:13:33,000
it's time to take things up a notch.

244
00:13:33,000 --> 00:13:35,000
It's kind of dark in here.

245
00:13:35,000 --> 00:13:37,000
Maybe we need to light a fire.

246
00:13:37,000 --> 00:13:38,000
Well, you like it?

247
00:13:38,000 --> 00:13:40,000
We got a sealed floor, total control, no wind.

248
00:13:40,000 --> 00:13:42,000
It's perfect experimental space,

249
00:13:42,000 --> 00:13:44,000
and the fire department says,

250
00:13:44,000 --> 00:13:46,000
provisionally, we can light a fire.

251
00:13:46,000 --> 00:13:47,000
I love it.

252
00:13:47,000 --> 00:13:50,000
Yep, the sealed floor and contained environment

253
00:13:50,000 --> 00:13:53,000
is perfect for this myth.

254
00:13:53,000 --> 00:13:54,000
Oh, no!

255
00:13:58,000 --> 00:14:00,000
Okay, let's get started with work.

256
00:14:00,000 --> 00:14:02,000
At this point, we've learned what gasoline does

257
00:14:02,000 --> 00:14:04,000
when you lay it out in a stream and light it.

258
00:14:04,000 --> 00:14:06,000
But we have yet to see what happens

259
00:14:06,000 --> 00:14:10,000
when it's coming out of something that's moving, like a vehicle.

260
00:14:10,000 --> 00:14:12,000
So we're going to go ahead and light it up.

261
00:14:12,000 --> 00:14:15,000
And we're going to see what happens when it's coming out

262
00:14:15,000 --> 00:14:17,000
of something that's moving, like a vehicle.

263
00:14:17,000 --> 00:14:20,000
So I figure, like we normally do,

264
00:14:20,000 --> 00:14:23,000
we like to start out small to see what we're dealing with.

265
00:14:23,000 --> 00:14:25,000
And therefore, I've invented this thing,

266
00:14:25,000 --> 00:14:27,000
which I call the fire bug.

267
00:14:27,000 --> 00:14:29,000
Which, let's face it,

268
00:14:29,000 --> 00:14:32,000
is a remote-controlled fire hazard on wheels.

269
00:14:32,000 --> 00:14:33,000
That's absolutely perfect.

270
00:14:33,000 --> 00:14:36,000
Well, you want to just start running around

271
00:14:36,000 --> 00:14:39,000
and I'll light the back end as it goes?

272
00:14:39,000 --> 00:14:40,000
Yeah.

273
00:14:40,000 --> 00:14:42,000
With a full, squeezy bottle of gas on board,

274
00:14:42,000 --> 00:14:44,000
the fire bug is ready.

275
00:14:44,000 --> 00:14:47,000
Fire extinguisher. I'm totally ready.

276
00:14:47,000 --> 00:14:49,000
And by turning the nozzle down

277
00:14:49,000 --> 00:14:51,000
to simulate a leaking gas tank,

278
00:14:51,000 --> 00:14:53,000
Jamie is all set.

279
00:14:53,000 --> 00:14:54,000
Okay, ready?

280
00:14:54,000 --> 00:14:55,000
Yeah.

281
00:14:56,000 --> 00:14:58,000
The fire bug takes off,

282
00:14:58,000 --> 00:15:01,000
leaving a perfect trail of gasoline in its wake,

283
00:15:01,000 --> 00:15:03,000
which Adam happily sets a blaze.

284
00:15:03,000 --> 00:15:04,000
There we go.

285
00:15:04,000 --> 00:15:09,000
This little thing is about the coolest RC toy

286
00:15:09,000 --> 00:15:11,000
that I've ever seen,

287
00:15:11,000 --> 00:15:13,000
but it's extremely dangerous.

288
00:15:13,000 --> 00:15:15,000
You can't do this at home.

289
00:15:15,000 --> 00:15:16,000
You may have an RC car,

290
00:15:16,000 --> 00:15:17,000
you may have some gasoline,

291
00:15:17,000 --> 00:15:18,000
but you could die,

292
00:15:18,000 --> 00:15:19,000
you could burn your house down.

293
00:15:19,000 --> 00:15:22,000
This is the coolest remote-controlled car I've ever seen.

294
00:15:22,000 --> 00:15:24,000
We've got fire extinguishers and EMTs

295
00:15:24,000 --> 00:15:25,000
and everything.

296
00:15:25,000 --> 00:15:26,000
We're prepared.

297
00:15:26,000 --> 00:15:28,000
You're not done.

298
00:15:28,000 --> 00:15:29,000
You're not done.

299
00:15:29,000 --> 00:15:30,000
You're not done.

300
00:15:30,000 --> 00:15:31,000
You're not done.

301
00:15:31,000 --> 00:15:32,000
You're not done.

302
00:15:32,000 --> 00:15:33,000
You're prepared.

303
00:15:33,000 --> 00:15:34,000
You're not.

304
00:15:34,000 --> 00:15:35,000
Don't try it at home.

305
00:15:35,000 --> 00:15:37,000
That was actually a pretty good test.

306
00:15:37,000 --> 00:15:40,000
It told us a lot of what we needed to know.

307
00:15:40,000 --> 00:15:43,000
We wanted to know if you could lay down a line of fuel

308
00:15:43,000 --> 00:15:44,000
out of a moving vehicle,

309
00:15:44,000 --> 00:15:46,000
and it would remain continuous.

310
00:15:46,000 --> 00:15:47,000
The answer is yes.

311
00:15:47,000 --> 00:15:50,000
And it doesn't seem like we need that much fuel.

312
00:15:50,000 --> 00:15:52,000
So I think we're ready to go full-scale.

313
00:15:52,000 --> 00:15:54,000
I think we've learned what we wanted to know,

314
00:15:54,000 --> 00:15:56,000
although Jamie still seems to be enjoying setting stuff on.

315
00:15:56,000 --> 00:16:01,000
Full-scale it is.

316
00:16:01,000 --> 00:16:05,000
And for that, they need Firebug's big brother.

317
00:16:05,000 --> 00:16:08,000
Say hello to the Firebeast.

318
00:16:08,000 --> 00:16:10,000
The Firebeast.

319
00:16:10,000 --> 00:16:13,000
A truck with a leaking gas tank attachment.

320
00:16:13,000 --> 00:16:16,000
Don't expect to see one of these in a showroom near you.

321
00:16:16,000 --> 00:16:18,000
This is the patented Mythbusters 10-minute solution

322
00:16:18,000 --> 00:16:21,000
for controlling the fuel from the driver's seat.

323
00:16:21,000 --> 00:16:23,000
Rather than a complex solenoid-driven valve

324
00:16:23,000 --> 00:16:25,000
or something like that, it's a rope.

325
00:16:25,000 --> 00:16:27,000
It's got a little hole on the rope,

326
00:16:27,000 --> 00:16:29,000
nozzles and lifts above the level of the fuel.

327
00:16:29,000 --> 00:16:31,000
Let it go, and it starts to run out.

328
00:16:31,000 --> 00:16:33,000
It's just that simple.

329
00:16:33,000 --> 00:16:34,000
Mythbuster Ingenuity.

330
00:16:34,000 --> 00:16:37,000
Also useful for time-saving home inventions.

331
00:16:37,000 --> 00:16:39,000
I use one of those when I go to the bathroom.

332
00:16:39,000 --> 00:16:41,000
I'm done.

333
00:16:41,000 --> 00:16:44,000
So on this test, Adam and Jamie will get a good feel

334
00:16:44,000 --> 00:16:45,000
for this movie myth.

335
00:16:45,000 --> 00:16:48,000
They already know a gas trail burns like it does in the movies.

336
00:16:48,000 --> 00:16:52,000
They've got 44 and 22-caliber-sized bullet holes

337
00:16:52,000 --> 00:16:53,000
in their gas tank.

338
00:16:53,000 --> 00:16:56,000
And they've seen, in small scale,

339
00:16:56,000 --> 00:16:59,000
a continuous gas trail laid by a moving vehicle.

340
00:16:59,000 --> 00:17:02,000
I am the fire ninja, Tom.

341
00:17:02,000 --> 00:17:04,000
And you could say Adam is excited.

342
00:17:06,000 --> 00:17:08,000
And sore.

343
00:17:08,000 --> 00:17:10,000
So, I mean, our goal here is just to find out

344
00:17:10,000 --> 00:17:13,000
if the 22-caliber-sized hole or the 44-caliber hole

345
00:17:13,000 --> 00:17:17,000
leaves enough fuel behind the truck for the fire to follow, right?

346
00:17:17,000 --> 00:17:20,000
And at what speed it'll sort of keep up with it.

347
00:17:20,000 --> 00:17:23,000
So, I'm just going to listen for your cues on the radio.

348
00:17:23,000 --> 00:17:25,000
And you tell me to speed up or slow down.

349
00:17:25,000 --> 00:17:26,000
That's what I'll do.

350
00:17:26,000 --> 00:17:29,000
Okay, start with a baseline of like five miles an hour.

351
00:17:29,000 --> 00:17:30,000
A good brisk run.

352
00:17:30,000 --> 00:17:32,000
In this action movie scenario,

353
00:17:32,000 --> 00:17:35,000
Jamie's playing the part of the escaping bad guy

354
00:17:35,000 --> 00:17:38,000
with a 22-caliber bullet hole in his gas tank.

355
00:17:39,000 --> 00:17:41,000
It's time to burn for science.

356
00:17:42,000 --> 00:17:43,000
Let's go.

357
00:17:43,000 --> 00:17:45,000
And Adam is standing in for the hero

358
00:17:45,000 --> 00:17:49,000
who's going to light up the gas trail Jamie's leaving behind.

359
00:17:49,000 --> 00:17:53,000
Jamie, whenever you're ready, lower down the fuel and start driving.

360
00:17:55,000 --> 00:17:57,000
Jamie the villain makes a run for it.

361
00:17:57,000 --> 00:17:59,000
I'm lighting the fuel now.

362
00:18:02,000 --> 00:18:05,000
You can slow down Jamie, it's moving quite slowly.

363
00:18:05,000 --> 00:18:07,000
But there's no need to hurry.

364
00:18:08,000 --> 00:18:10,000
That's moving really slowly.

365
00:18:10,000 --> 00:18:13,000
Not exactly the high-speed blazing trail of fire

366
00:18:13,000 --> 00:18:15,000
we're used to seeing on the silver screen.

367
00:18:15,000 --> 00:18:17,000
Okay, yeah, you can stop it.

368
00:18:17,000 --> 00:18:22,000
I had to put my brakes on, I wasn't giving it any fuel to get it to go that slow.

369
00:18:22,000 --> 00:18:25,000
I was just idling with my brakes half on to do that.

370
00:18:25,000 --> 00:18:28,000
You can pretty much push a car faster than gasoline burns.

371
00:18:28,000 --> 00:18:29,000
Kind of sorta.

372
00:18:29,000 --> 00:18:31,000
So does that put the brakes on this myth

373
00:18:31,000 --> 00:18:34,000
or will the 44-caliber sized hole make a difference?

374
00:18:35,000 --> 00:18:38,000
My prediction is from what I saw in the bunker test,

375
00:18:38,000 --> 00:18:40,000
volume didn't affect speed that much.

376
00:18:40,000 --> 00:18:44,000
Now, this is a much bigger test than we were able to do in the bunker

377
00:18:44,000 --> 00:18:46,000
so this will be pretty definitive

378
00:18:46,000 --> 00:18:49,000
but I don't think it's going to prove anything different than we've already seen.

379
00:18:52,000 --> 00:18:56,000
Jamie moves off, gently idling along at less than five miles an hour,

380
00:18:56,000 --> 00:18:59,000
easily staying ahead of the lit trail.

381
00:19:00,000 --> 00:19:04,000
It's looking good Jamie, it's keeping in case with you about ten feet back.

382
00:19:04,000 --> 00:19:08,000
Until Adam has a lapse in concentration on radio duties

383
00:19:08,000 --> 00:19:11,000
and fails to warn Jamie the flames are gaining on him.

384
00:19:11,000 --> 00:19:13,000
Faster, faster, faster!

385
00:19:14,000 --> 00:19:15,000
Lift it up!

386
00:19:17,000 --> 00:19:25,000
It was going along fine until it started to catch up a little bit

387
00:19:25,000 --> 00:19:27,000
and all of a sudden Adam's saying gun it

388
00:19:27,000 --> 00:19:29,000
and I took off but it was too late.

389
00:19:29,000 --> 00:19:32,000
It actually stayed with me and it caught up with the tank

390
00:19:32,000 --> 00:19:34,000
and I could have set it off.

391
00:19:34,000 --> 00:19:37,000
Traveling at the lower limit of the speedometer,

392
00:19:37,000 --> 00:19:39,000
Jamie is unsure of his speed

393
00:19:39,000 --> 00:19:43,000
but it seems as though the fresher the trail, the faster it burns.

394
00:19:44,000 --> 00:19:47,000
However, another run to test that hypothesis

395
00:19:47,000 --> 00:19:50,000
is brought to an abrupt end when Jamie gets hemmed in.

396
00:19:50,000 --> 00:19:54,000
Guys I'm going to stop, we're going to start to have crossover.

397
00:19:55,000 --> 00:19:58,000
As another band of busters once said,

398
00:19:58,000 --> 00:20:01,000
it's a bad idea to cross the streets.

399
00:20:06,000 --> 00:20:08,000
Hey you it stinks in here!

400
00:20:09,000 --> 00:20:11,000
We're waiting for the smoke to clear in there

401
00:20:11,000 --> 00:20:15,000
but provisionally I'll say the 44 caliber hole test was really educational.

402
00:20:15,000 --> 00:20:21,000
Specifically noticing that the closer the line of gas got to the source,

403
00:20:21,000 --> 00:20:25,000
i.e. the gas tank, the faster the flame traveled.

404
00:20:25,000 --> 00:20:27,000
Remember it's not the liquid gas that's burning,

405
00:20:27,000 --> 00:20:30,000
it's the vapor gas above the liquid.

406
00:20:30,000 --> 00:20:33,000
So if it's had a long time to settle that vapor spreads out

407
00:20:33,000 --> 00:20:36,000
and it's got a lot of wind resistance like a weather front

408
00:20:36,000 --> 00:20:38,000
but the closer it gets the faster it travels.

409
00:20:38,000 --> 00:20:40,000
There may actually be something to this.

410
00:20:42,000 --> 00:20:44,000
Three, two...

411
00:20:44,000 --> 00:20:47,000
Carrie Grant and Tori have burnt their bra

412
00:20:47,000 --> 00:20:50,000
and proved it's plausible that underwired underwear

413
00:20:50,000 --> 00:20:52,000
can be too hot to handle.

414
00:20:52,000 --> 00:20:56,000
But the team have their eye on another defibrillator myth.

415
00:20:56,000 --> 00:21:01,000
So this myth is about defibrillating somebody who has nipple piercings.

416
00:21:01,000 --> 00:21:05,000
Now they're metal and there's a possibility that when the paddles go to the skin

417
00:21:05,000 --> 00:21:10,000
and they discharge that it could actually arc to the metal in the piercing.

418
00:21:10,000 --> 00:21:13,000
Our ballistics media torso is going through a rebellious phase

419
00:21:13,000 --> 00:21:16,000
and wants to upset his mom.

420
00:21:16,000 --> 00:21:19,000
I'm pretty sure this isn't how they do it.

421
00:21:19,000 --> 00:21:21,000
A barbell in each nipple should do it.

422
00:21:21,000 --> 00:21:22,000
This looks really weird.

423
00:21:22,000 --> 00:21:24,000
You think?

424
00:21:24,000 --> 00:21:26,000
Let's just, yeah, let's just do this one.

425
00:21:26,000 --> 00:21:30,000
They're using 40 times the voltage of a household socket

426
00:21:30,000 --> 00:21:34,000
real close to a conductive metal object in the left nipple of the patient.

427
00:21:34,000 --> 00:21:36,000
As ElectricSix once said,

428
00:21:36,000 --> 00:21:39,000
danger, danger, high voltage.

429
00:21:39,000 --> 00:21:42,000
Nipple piercing defibrillation test with the paddles

430
00:21:42,000 --> 00:21:45,000
ridiculously close together touching the piercing.

431
00:21:45,000 --> 00:21:49,000
Three, two, one, clear!

432
00:21:49,000 --> 00:21:50,000
Whoa!

433
00:21:50,000 --> 00:21:51,000
Ow!

434
00:21:51,000 --> 00:21:52,000
That was a good one.

435
00:21:52,000 --> 00:21:53,000
That was good.

436
00:21:53,000 --> 00:21:59,000
The end of the piercing is black surrounded by like an indention

437
00:21:59,000 --> 00:22:01,000
that took the coating off of the piercing.

438
00:22:01,000 --> 00:22:02,000
Whoa.

439
00:22:02,000 --> 00:22:04,000
That seems like it'd be enough to burn you.

440
00:22:04,000 --> 00:22:07,000
Yeah, I think the kind of heat that would melt the coating.

441
00:22:07,000 --> 00:22:08,000
Definitely!

442
00:22:08,000 --> 00:22:10,000
Burn your skin.

443
00:22:10,000 --> 00:22:12,000
So are the fans right?

444
00:22:12,000 --> 00:22:15,000
Is this another plausible result?

445
00:22:15,000 --> 00:22:17,000
Okay guys, what do we call on this one?

446
00:22:17,000 --> 00:22:18,000
That's a good question.

447
00:22:18,000 --> 00:22:22,000
Well, we did get some scorching from arcing between the defibrillator paddles.

448
00:22:22,000 --> 00:22:25,000
Yeah, but that's when the paddles were practically touching each other.

449
00:22:25,000 --> 00:22:28,000
You know, during defibrillation, there's no way they would be that close.

450
00:22:28,000 --> 00:22:31,000
And the metal of the underwire bra would have to be exposed.

451
00:22:31,000 --> 00:22:36,000
And medics are trained to remove anything that's going to impede that procedure anyway.

452
00:22:36,000 --> 00:22:39,000
So we're calling this one plausible?

453
00:22:39,000 --> 00:22:41,000
Yeah, but totally unlikely.

454
00:22:41,000 --> 00:22:42,000
Almost impossible.

455
00:22:42,000 --> 00:22:43,000
Alright.

456
00:23:07,000 --> 00:23:09,000
Alright, that's enough.

457
00:23:09,000 --> 00:23:10,000
Okay.

458
00:23:10,000 --> 00:23:11,000
Woo!

459
00:23:36,000 --> 00:23:38,000
I'm rolling it into gasoline.

460
00:23:39,000 --> 00:23:41,000
Nothing's happened.

461
00:23:41,000 --> 00:23:45,000
But this time they're testing whether the trail, lit by GI Jamie,

462
00:23:45,000 --> 00:23:48,000
will blow up an escaping car's gas tank.

463
00:23:49,000 --> 00:23:53,000
And for a definitive answer, they've returned to the runway at Alameda.

464
00:23:53,000 --> 00:23:55,000
This is perfect!

465
00:23:55,000 --> 00:24:00,000
The sun is setting, the wind's dying, we've got like ideal real-world conditions here.

466
00:24:00,000 --> 00:24:03,000
And just as importantly, it'll be dark soon,

467
00:24:03,000 --> 00:24:06,000
meaning they'll be able to clearly see the flame.

468
00:24:06,000 --> 00:24:08,000
The first thing we're going to do is sort of a control.

469
00:24:08,000 --> 00:24:11,000
We're going to put a 44-caliber sized hole in the tank.

470
00:24:11,000 --> 00:24:15,000
Gasoline's going to come running out of the tank as the truck is moving.

471
00:24:15,000 --> 00:24:20,000
Remember, the previous tests took place on a sealed floor out of the elements.

472
00:24:20,000 --> 00:24:25,000
So this first test is a control to see if the lit trail burns continuously,

473
00:24:25,000 --> 00:24:27,000
just like it did indoors.

474
00:24:28,000 --> 00:24:33,000
Jamie at the start position lowers the hose, letting the fuel spill out.

475
00:24:33,000 --> 00:24:34,000
And go!

476
00:24:34,000 --> 00:24:39,000
And Adam once again fanning the flames of his pyromania lights her up.

477
00:24:39,000 --> 00:24:40,000
More, more, more.

478
00:24:40,000 --> 00:24:41,000
More, more.

479
00:24:41,000 --> 00:24:43,000
Good, good speed, good speed.

480
00:24:48,000 --> 00:24:51,000
And that's pretty much all she wrote.

481
00:24:51,000 --> 00:24:56,000
A good control, but really it's a case of so far so slow.

482
00:24:56,000 --> 00:25:02,000
In the testing so far, I've been driving so slowly that it's not even registering on the speedometer.

483
00:25:02,000 --> 00:25:07,000
This next test I'm going to get up to 20 miles an hour before I hit the starting line.

484
00:25:07,000 --> 00:25:12,000
Right at the starting line, I'll be dropping the hose, starting to like fuel out.

485
00:25:12,000 --> 00:25:18,000
And my guess is that it's going to be such a thin stream that actually contacts the pavement

486
00:25:18,000 --> 00:25:21,000
that it's not going to light more than a few inches.

487
00:25:21,000 --> 00:25:23,000
It's still moving towards him.

488
00:25:24,000 --> 00:25:26,000
Oh, but it's petering out.

489
00:25:27,000 --> 00:25:30,000
Which means the fleeing fugitive is free and clear.

490
00:25:31,000 --> 00:25:33,000
And 20 miles an hour isn't it fast?

491
00:25:33,000 --> 00:25:39,000
No, not like an action movie car chase would be a lot faster, so it would only get worse for this myth at any speed above 20.

492
00:25:41,000 --> 00:25:42,000
Not looking too good.

493
00:25:42,000 --> 00:25:43,000
No, it's not.

494
00:25:43,000 --> 00:25:49,000
Yep, if our villain takes off at any kind of reasonable speed, the trail simply burns out.

495
00:25:50,000 --> 00:25:55,000
And although the fat lady is preparing her tonsils, Adam and Jamie aren't ready to call it.

496
00:25:55,000 --> 00:25:58,000
After all, there's two parts to this myth.

497
00:25:58,000 --> 00:26:05,000
Even though we've proved that it is extremely unlikely, under most circumstances, for the line of burning gasoline to get to the tank,

498
00:26:05,000 --> 00:26:08,000
now it's time to find out what happens if it actually does.

499
00:26:08,000 --> 00:26:15,000
Adam in full safety gear lights up the pool of fuel, and Jamie crawls forward, letting the flame catch up.

500
00:26:16,000 --> 00:26:18,000
Okay, it's reached the tank.

501
00:26:20,000 --> 00:26:24,000
It's reached the tank. It's burning up this line, but it's not exploding yet.

502
00:26:24,000 --> 00:26:26,000
Don't let your guard down yet.

503
00:26:27,000 --> 00:26:28,000
Don't worry.

504
00:26:28,000 --> 00:26:30,000
That was not what I expected out of that test.

505
00:26:30,000 --> 00:26:37,000
You know, in every movie, every bullet or cigarette equals an exploding gas tank. They seem to be on air triggers.

506
00:26:37,000 --> 00:26:46,000
And in this case, we had gas pouring out of a tank on fire for about a good six or seven minutes.

507
00:26:46,000 --> 00:26:51,000
The wind started to whip up the gasoline and the flames.

508
00:26:51,000 --> 00:26:54,000
The flames got under the tank, which heated it up.

509
00:26:54,000 --> 00:27:01,000
And once they heated it up, the air inside started expanding, and I started watching the gas spewing out of the hole.

510
00:27:01,000 --> 00:27:08,000
At that point, the flames got so vigorous, they engulfed one of our cameras, and I decided to pull the plug and extinguish everything.

511
00:27:08,000 --> 00:27:09,000
Who?

512
00:27:09,000 --> 00:27:11,000
Camera, let's put it out.

513
00:27:13,000 --> 00:27:14,000
So what do we do now?

514
00:27:14,000 --> 00:27:21,000
Well, I think we're back to our old friend and nemesis, air-fuel mixture.

515
00:27:21,000 --> 00:27:28,000
In an attempt to get that Hollywood-style big boom, Adam and Jamie opened up several ports on the tank.

516
00:27:28,000 --> 00:27:30,000
But why are they even necessary?

517
00:27:30,000 --> 00:27:37,000
Gasoline or gasoline vapor by itself is not exploding. It needs a source of ignition, and it needs air.

518
00:27:37,000 --> 00:27:42,000
In fact, it needs a very specific amount of air for it to blow up.

519
00:27:42,000 --> 00:27:50,000
That range is above 1.4% vapor to air or below 7.6% vapor to air.

520
00:27:50,000 --> 00:27:53,000
If it's outside that range, it's not exploding.

521
00:27:53,000 --> 00:27:58,000
If it's within that range and it has a source of ignition, it can blow up.

522
00:27:58,000 --> 00:28:05,000
Now, we're going to use this meter here to determine what we've got in the tank and whether we can get it to the butter zone or not.

523
00:28:05,000 --> 00:28:10,000
So the mix of air and fuel vapor in the gas tank has to be just right.

524
00:28:10,000 --> 00:28:17,000
In a vapor-rich environment, there has to be the right amount of air to be in what's known as the flammability band.

525
00:28:17,000 --> 00:28:25,000
And in a contained environment with an ignition source here in prime territory for an explosion.

526
00:28:25,000 --> 00:28:32,000
And to detect that crucial air-to-fuel ratio, the guys are using a portable gas monitor.

527
00:28:32,000 --> 00:28:35,000
It's going back and forth between 4 and 4.5.

528
00:28:35,000 --> 00:28:37,000
That's fantastic.

529
00:28:37,000 --> 00:28:40,000
And so we're right in the butter zone.

530
00:28:40,000 --> 00:28:43,000
Awesome, let's go. Let's do it.

531
00:28:43,000 --> 00:28:47,000
With the added through flow, the air-fuel mixture is perfect.

532
00:28:47,000 --> 00:28:50,000
And we're about to find out...

533
00:28:50,000 --> 00:28:52,000
Go ahead!

534
00:28:52,000 --> 00:28:57,000
...if those spectacular cinematic explosions are based on real-world physics...

535
00:28:57,000 --> 00:29:00,000
Careful, you guys. Not too close.

536
00:29:00,000 --> 00:29:02,000
...or simply movie magic.

537
00:29:02,000 --> 00:29:04,000
Good, stop!

538
00:29:05,000 --> 00:29:11,000
It's burning in the tank, but it's stubbornly refusing to detonate.

539
00:29:11,000 --> 00:29:14,000
The facts here are pretty simple.

540
00:29:14,000 --> 00:29:17,000
We were at 5%. That is exactly the butter zone we were looking for.

541
00:29:17,000 --> 00:29:24,000
We got perfect ignition. The test went really well and we did not get an explosion.

542
00:29:24,000 --> 00:29:30,000
This is actually really frustrating to look at because if the tank is enclosed,

543
00:29:30,000 --> 00:29:33,000
it very quickly goes above the explosive limit.

544
00:29:33,000 --> 00:29:38,000
If it's open like we had it, then it's just burning.

545
00:29:38,000 --> 00:29:40,000
It's just flame. It's not explosion.

546
00:29:40,000 --> 00:29:44,000
No explosion! That's a result.

547
00:29:46,000 --> 00:29:48,000
How do you want to wrap up a vapor trail?

548
00:29:48,000 --> 00:29:52,000
Well, the flame did follow right along that trail of gasoline as it was laid down.

549
00:29:52,000 --> 00:29:54,000
In fact, it went all the way up to the tank.

550
00:29:54,000 --> 00:29:58,000
Yeah, but it went so slowly, man. It would never catch up to any car.

551
00:29:58,000 --> 00:30:01,000
You could push a car faster than that gasoline trail burn.

552
00:30:01,000 --> 00:30:04,000
And once it got to the tank, it no blow up.

553
00:30:04,000 --> 00:30:06,000
I guess we got to call it busted then.

554
00:30:06,000 --> 00:30:07,000
Busted, it is.

555
00:30:29,000 --> 00:30:33,000
Jamie and Adam have busted the movie myth that a blazing trail of gasoline

556
00:30:33,000 --> 00:30:37,000
will catch a car and explode the gas tank.

557
00:30:37,000 --> 00:30:40,000
But this fiery fable is still alive.

558
00:30:40,000 --> 00:30:45,000
I know it's been a segue, but I don't feel like we're all the way done with Hollywood pyrotechnics just yet.

559
00:30:45,000 --> 00:30:46,000
Why is that?

560
00:30:46,000 --> 00:30:51,000
Because I've got another one I want to try and it is an old cowboy myth that involves gunpowder.

561
00:30:51,000 --> 00:30:57,000
Oh, you mean where the bad guy lays down the trail of gunpowder, it goes to the keg, he lights it.

562
00:30:57,000 --> 00:31:01,000
But the good guy rushes in and puts out the flame right before it reaches the keg.

563
00:31:01,000 --> 00:31:04,000
It's like you're a mind reader or something. That's exactly it.

564
00:31:06,000 --> 00:31:09,000
So it's Trail Blazers Part 2.

565
00:31:10,000 --> 00:31:13,000
But this movie myth comes from way back yonder,

566
00:31:13,000 --> 00:31:19,000
when your average action scene involved cowboys and gunpowder, not cars and gasoline.

567
00:31:19,000 --> 00:31:31,000
A lit trail of gunpowder is heading for a powder keg, and if it can't be stopped, disaster.

568
00:31:31,000 --> 00:31:37,000
But our hero saves the day by leaping ahead of the sparking fuse and kicking out the trail.

569
00:31:39,000 --> 00:31:44,000
Back in the bunker, the team begin testing to find out what would happen in real life.

570
00:31:44,000 --> 00:31:47,000
I don't think this is going to work. The whole premise we're testing.

571
00:31:47,000 --> 00:31:56,000
Just kind of cowboy, lay out a line of black powder, and if I saw it and tried to kick out that powder before it got to something that was going to blow up, would I have enough time?

572
00:31:56,000 --> 00:31:59,000
I don't think I would. I think the black powder is going to burn too fast.

573
00:31:59,000 --> 00:32:05,000
Every time we've ever noodled with it on the show, it's defining characteristic is that it's super fast.

574
00:32:05,000 --> 00:32:10,000
So like the vapor trail, Adam thinks this movie myth is just another special effect.

575
00:32:10,000 --> 00:32:16,000
My guess is it's going to be less a shh than a shaboom kind of moment.

576
00:32:16,000 --> 00:32:21,000
Well, without the boom, we're not adding in any boom just yet. It's all about the shh.

577
00:32:21,000 --> 00:32:29,000
On site supervising, it's pyrotechnician Rob Clott, and he's got the shaboom making material.

578
00:32:29,000 --> 00:32:37,000
This is black powder. You can buy this in most gun shops, and it's actually the closest thing we have to what would be period correct for like a cowboy movie.

579
00:32:38,000 --> 00:32:42,000
First up, they're starting small, a trail just a few feet long.

580
00:32:42,000 --> 00:32:45,000
I think that's great. What do you think? I mean, this is just to see how, what it does.

581
00:32:45,000 --> 00:32:47,000
Just see how it feels.

582
00:32:47,000 --> 00:32:52,000
To light it safely, Adam has pulled out all the stops to impress Rob.

583
00:32:52,000 --> 00:33:06,000
This is a standard industry remote lighter. This is your butane torch on the end of a couple of tie straps on some structural aluminum, providing some distance between me and a flame so I can light while I'm safely away from the explosion.

584
00:33:06,000 --> 00:33:11,000
Alright. Everybody ready? There we go.

585
00:33:18,000 --> 00:33:20,000
That's a little too fast.

586
00:33:20,000 --> 00:33:26,000
Yep, and the myth that you could run ahead of the burning fuse looks like it's gone up in smoke already.

587
00:33:26,000 --> 00:33:35,000
Gun powder by design burns very quickly. When you have it inside a gun, it burns explosively quickly. When we lay it out in a line, it just kind of burns fast.

588
00:33:35,000 --> 00:33:46,000
Well, it behaved exactly the way I thought it would behave. In fact, you'll see that the rating for this is, which is pretty much the sound it made when we lit it. And that's what it's based on.

589
00:33:46,000 --> 00:33:48,000
What do you think we do now?

590
00:33:48,000 --> 00:33:55,000
Well, I think we need to come up with a more controlled way of laying down the powder. Something's very consistent and maybe a little less of it.

591
00:33:56,000 --> 00:34:06,000
Jamie, basing his design on an old-fashioned powder horn, soon has a solution. And they're ready to see how quickly a three-foot line of powder burns.

592
00:34:08,000 --> 00:34:09,000
Oh, look at that.

593
00:34:09,000 --> 00:34:21,000
That was really nice. That was much slower. And it was like, pshhh. I thought that if we laid out a line here and it was fairly visible black powder, that it would go, pshhh, and just go really fast.

594
00:34:21,000 --> 00:34:29,000
But in fact, it seems to burn at a rate not unreasonably close to what I'm used to remembering in cowboy movies.

595
00:34:29,000 --> 00:34:45,000
I'm starting to think that if we laid out a line of powder like this, maybe 20 feet long, with a, you know, keg at the end that might blow up, and I had a few seconds to run over and kick this line so it would stop igniting, but I might actually be able to do that.

596
00:34:48,000 --> 00:34:50,000
I figure I could outrun that for you.

597
00:34:50,000 --> 00:34:53,000
Well, if you want to try it, say we get out to the bomb range and do it for real.

598
00:34:53,000 --> 00:34:55,000
Okay. Let's get out of here.

599
00:34:58,000 --> 00:35:02,000
Alameda County Bomb Disposal Range. Adam and Jamie's second home.

600
00:35:02,000 --> 00:35:04,000
Another day at the bomb range.

601
00:35:04,000 --> 00:35:05,000
That's right.

602
00:35:05,000 --> 00:35:11,000
And as usual, their hospitable host, keeping them out of hospital, is Sergeant JD Nelson.

603
00:35:11,000 --> 00:35:17,000
The bomb range is a perfect location for us because we can blow stuff up, but it's a little bit rocky.

604
00:35:17,000 --> 00:35:21,000
And it's dirt, so we want to be able to see the black powder.

605
00:35:21,000 --> 00:35:25,000
We're going to lay out basically a dance floor for dancing with the black powder.

606
00:35:25,000 --> 00:35:34,000
It's about 20 some odd sheets of plywood or chipboard that we're going to lay out in a line approximately 80 to 100 feet long.

607
00:35:34,000 --> 00:35:37,000
Should be plenty of a run for our black powder tests.

608
00:35:39,000 --> 00:35:40,000
Well, there you go.

609
00:35:40,000 --> 00:35:41,000
Dance floor.

610
00:35:41,000 --> 00:35:42,000
My dance card is empty.

611
00:35:42,000 --> 00:35:43,000
Let's go.

612
00:35:43,000 --> 00:35:47,000
Adam's job is to kick out the line of burning powder before it reaches this.

613
00:35:47,000 --> 00:35:51,000
Now, for safety reasons, we're not going to put any powder in this.

614
00:35:51,000 --> 00:35:55,000
We're not quite ready for Adam to blow up just yet.

615
00:35:55,000 --> 00:35:59,000
What Jamie means is for safety reasons, the keg will be empty.

616
00:35:59,000 --> 00:36:07,000
But at the end of an 80 foot trail of black powder, Adam can't resist adding a cup full of extra motivation.

617
00:36:07,000 --> 00:36:14,000
My motivation for this is really like, you know, humanity is going down the wrong path.

618
00:36:14,000 --> 00:36:16,000
That's the gunpowder line.

619
00:36:16,000 --> 00:36:24,000
And I'm the only one who can see that it's burning and I've got to kick it out before it explodes.

620
00:36:27,000 --> 00:36:29,000
Two, three, here we go.

621
00:36:31,000 --> 00:36:33,000
It's not that hard to outrun it.

622
00:36:34,000 --> 00:36:37,000
Here it comes.

623
00:36:41,000 --> 00:36:43,000
I stopped it.

624
00:36:43,000 --> 00:36:44,000
Look at that.

625
00:36:44,000 --> 00:36:46,000
Here, light this one.

626
00:36:49,000 --> 00:36:51,000
It's like a really brisk walk, really.

627
00:36:53,000 --> 00:36:55,000
Here comes the thing.

628
00:37:00,000 --> 00:37:02,000
This is a fun job.

629
00:37:03,000 --> 00:37:07,000
Well, I don't know about you, but it seems to me it doesn't move as fast as I thought it was going to move.

630
00:37:07,000 --> 00:37:11,000
I think it's pretty easy to run down a line of gunpowder and kick it out to stop it from blowing up.

631
00:37:11,000 --> 00:37:14,000
If you want to give it a shot, I think we've got this one in the back.

632
00:37:14,000 --> 00:37:16,000
I'll go to a shot.

633
00:37:17,000 --> 00:37:19,000
Ready, racing powder.

634
00:37:19,000 --> 00:37:21,000
Adam, would you mind laying the powder?

635
00:37:21,000 --> 00:37:24,000
I'm just going to sort of relax and you can light it.

636
00:37:24,000 --> 00:37:26,000
I got a good view.

637
00:37:26,000 --> 00:37:29,000
Jamie's idea of racing is pretty laid back.

638
00:37:29,000 --> 00:37:31,000
Powder kick test number two.

639
00:37:31,000 --> 00:37:33,000
Grandpa Heidemann presiding.

640
00:37:35,000 --> 00:37:39,000
Jamie, cool as a cucumber, gives the fuse a good head start.

641
00:37:39,000 --> 00:37:43,000
Of course, he's thinking his only obstacle will be covering the ground in time.

642
00:37:51,000 --> 00:37:53,000
I'm still going.

643
00:37:55,000 --> 00:37:57,000
He pushed me out of the way.

644
00:37:57,000 --> 00:37:59,000
What the hell was that?

645
00:37:59,000 --> 00:38:01,000
I was giving you more of a challenge.

646
00:38:04,000 --> 00:38:08,000
We wanted to find out whether it is possible to outrun a burning line of powder,

647
00:38:08,000 --> 00:38:13,000
break the line and stop it before it reaches the barrel and blows up the barrel.

648
00:38:13,000 --> 00:38:15,000
Turns out, it is.

649
00:38:15,000 --> 00:38:17,000
We did it. It's not that hard really.

650
00:38:18,000 --> 00:38:23,000
So the movie myth that you can outrun a lit trail of gunpowder is confirmed.

651
00:38:24,000 --> 00:38:26,000
But the fun doesn't end there.

652
00:38:26,000 --> 00:38:29,000
The fuse is still burning on this fable.

653
00:38:33,000 --> 00:38:34,000
Next.

654
00:38:35,000 --> 00:38:38,000
Adam and Jamie get their satisfaction.

655
00:38:38,000 --> 00:38:42,000
That was awesome. That was the best explosion we've ever done.

656
00:38:42,000 --> 00:38:49,000
Jamie, despite unforeseen obstacles, is confident that you can outrun and kick out a burning fuse of gunpowder.

657
00:38:49,000 --> 00:38:53,000
The next thing we need to know is what would happen if you were not successful.

658
00:38:53,000 --> 00:38:59,000
Maybe somebody got in your way or pushed you and, you know, before you were able to do your job,

659
00:38:59,000 --> 00:39:01,000
does the barrel blow up?

660
00:39:01,000 --> 00:39:03,000
Will it run up the stream of powder?

661
00:39:03,000 --> 00:39:05,000
Will it run up the stream of powder?

662
00:39:05,000 --> 00:39:07,000
Will it run up the stream of powder?

663
00:39:07,000 --> 00:39:09,000
Will it run up the stream of powder?

664
00:39:09,000 --> 00:39:13,000
Will it run up the stream of powder coming out of the barrel?

665
00:39:13,000 --> 00:39:15,000
Are we going to see a big explosion?

666
00:39:15,000 --> 00:39:18,000
It's a cartoon caper classic.

667
00:39:18,000 --> 00:39:22,000
The lit fuse of gunpowder leads right to the powder keg and...

668
00:39:22,000 --> 00:39:23,000
Kalooly.

669
00:39:23,000 --> 00:39:29,000
But would the barrel really blow or would the fuse just fizzle out when it reaches the end of the line?

670
00:39:29,000 --> 00:39:31,000
Go ahead and plug it in.

671
00:39:32,000 --> 00:39:38,000
And to find out, they'll need to light the powder remotely and our bright sparks have just the thing.

672
00:39:38,000 --> 00:39:41,000
See, it's a 20,000 volt young transformer.

673
00:39:41,000 --> 00:39:45,000
I know that the electrical resistance of air is roughly 10,000 volts per centimeter,

674
00:39:45,000 --> 00:39:51,000
which means I only need to get the two ends of this transformer within two centimeters of each other

675
00:39:51,000 --> 00:39:53,000
for that arc to travel across them.

676
00:39:53,000 --> 00:39:56,000
And it is the most ideal thing to light the gunpowder.

677
00:39:57,000 --> 00:39:59,000
Perfect.

678
00:39:59,000 --> 00:40:05,000
Next, with Adam and Jamie displaying all the characteristics of kids who know the ice cream man is coming...

679
00:40:05,000 --> 00:40:07,000
Yet another thing to not try at home.

680
00:40:07,000 --> 00:40:11,000
Fill the keg with powder and lay down the road to explode.

681
00:40:11,000 --> 00:40:14,000
So as soon as the line gets here, shi-boom!

682
00:40:14,000 --> 00:40:16,000
At least in theory.

683
00:40:16,000 --> 00:40:19,000
It's a theory they can't wait to put into practice.

684
00:40:19,000 --> 00:40:24,000
Plus, there's a breeze and a danger the black powder will soon be blowing in the wind.

685
00:40:24,000 --> 00:40:26,000
Alright, let's do this thing.

686
00:40:26,000 --> 00:40:28,000
So it's double time down to the bunker.

687
00:40:28,000 --> 00:40:31,000
So I'm going to count it down and tell me when you're set.

688
00:40:32,000 --> 00:40:34,000
I am totally set now.

689
00:40:34,000 --> 00:40:38,000
Okay, going in three, two, one.

690
00:40:40,000 --> 00:40:41,000
There it goes.

691
00:40:41,000 --> 00:40:43,000
Look at it go.

692
00:40:43,000 --> 00:40:48,000
The trail is ablaze and just like in the movies, it races towards its destination.

693
00:40:48,000 --> 00:40:52,000
Come on little buddy, don't burn out! Go, go, go, go!

694
00:40:52,000 --> 00:40:54,000
A barrel full of big boom.

695
00:40:54,000 --> 00:40:56,000
Go, go, go.

696
00:40:56,000 --> 00:40:58,000
And...

697
00:40:59,000 --> 00:41:01,000
Yeah!

698
00:41:02,000 --> 00:41:07,000
That was awesome! That was the best explosion we've ever done!

699
00:41:09,000 --> 00:41:10,000
I swear!

700
00:41:10,000 --> 00:41:12,000
That was a serious bang.

701
00:41:12,000 --> 00:41:17,000
This is one cinematic and cartoon cliche that does exactly what it says on the label.

702
00:41:19,000 --> 00:41:24,000
What happens when a burning line of gun powder reaches a keg full of gun powder?

703
00:41:24,000 --> 00:41:26,000
Exactly what you think.

704
00:41:26,000 --> 00:41:28,000
It's going to blow up and that's what it did.

705
00:41:29,000 --> 00:41:32,000
Each one of these expands a little bit.

706
00:41:32,000 --> 00:41:35,000
And look at all the burn strikes on the inside.

707
00:41:35,000 --> 00:41:39,000
Yeah, exactly. It's quite clear what it did, but it blew out both heads.

708
00:41:39,000 --> 00:41:40,000
It blew out the weakest part.

709
00:41:40,000 --> 00:41:43,000
If you watch the show at all, you know that I like to live my life.

710
00:41:43,000 --> 00:41:46,000
Halfway like an action movie hero and halfway like a cartoon character.

711
00:41:46,000 --> 00:41:51,000
And this explosion satisfied both of those halves of my personality.

712
00:41:51,000 --> 00:41:55,000
I proclaim it my favorite ever Mythbusters explosion.

713
00:41:59,000 --> 00:42:01,000
How are we going to call this one?

714
00:42:01,000 --> 00:42:03,000
Alright, let's go down the list one by one.

715
00:42:03,000 --> 00:42:09,000
The myth that you can light a line of black powder and yet still someone can outrun that line as it's on fire

716
00:42:09,000 --> 00:42:13,000
and kick it and break it's stream before it gets to an explosive thing.

717
00:42:13,000 --> 00:42:14,000
Perfectly plausible.

718
00:42:14,000 --> 00:42:20,000
And the myth that that line of black powder if it got all the way to a powder keg full of powder would it explode that keg?

719
00:42:20,000 --> 00:42:23,000
Absolutely...plausible.

720
00:42:23,000 --> 00:42:25,000
I totally agree. I think it's plausible.

721
00:42:25,000 --> 00:42:27,000
I think we've done some very good work here today.

722
00:42:27,000 --> 00:42:28,000
Let's get out of here.