1 00:00:00,000 --> 00:00:07,000 Please, don't try anything that you're about to see us do at home. 2 00:00:07,000 --> 00:00:09,000 Ever. 3 00:00:09,000 --> 00:00:11,000 Take cover. 4 00:00:11,000 --> 00:00:16,000 On this episode of Mythbusters, Jamie and Adam get all steamed up. 5 00:00:16,000 --> 00:00:17,000 Woo! 6 00:00:17,000 --> 00:00:26,000 As they test if an ordinary water heater has the extraordinary ability to fly right through your house like a rocket. 7 00:00:26,000 --> 00:00:33,000 And our Rebel Trio try on some riveting, all-American legends about blue jeans. 8 00:00:33,000 --> 00:00:34,000 Oh, those are good. 9 00:00:34,000 --> 00:00:41,000 Charging off with, if you're dragged along the ground by a horse, could your jeans patch fire? 10 00:00:41,000 --> 00:00:44,000 Do you feel any heat in your pants? I mean. 11 00:00:44,000 --> 00:00:55,000 Then there's the blood-curdling tail that shrinking your jeans by sitting in a bath could squeeze the life right out of you. 12 00:00:55,000 --> 00:00:57,000 Oh my God! 13 00:00:57,000 --> 00:00:59,000 Are we gonna have to amp the tail to his leg? 14 00:01:02,000 --> 00:01:04,000 Who are the Mythbusters? 15 00:01:04,000 --> 00:01:06,000 It's time to blow some stuff up! 16 00:01:06,000 --> 00:01:10,000 Adam Savage and Jamie Heinemann. 17 00:01:10,000 --> 00:01:11,000 That was fun. 18 00:01:11,000 --> 00:01:15,000 Between them more than 30 years of special effects experience. 19 00:01:15,000 --> 00:01:18,000 This is the kind of thing I do on the weekend. 20 00:01:18,000 --> 00:01:21,000 Joining them, Carrie Byron. 21 00:01:21,000 --> 00:01:23,000 Come over here, you smell that? 22 00:01:23,000 --> 00:01:25,000 He's alive! 23 00:01:25,000 --> 00:01:27,000 And Tori Belichi. 24 00:01:27,000 --> 00:01:29,000 He's starting to feel like a bad idea. 25 00:01:29,000 --> 00:01:33,000 They don't just tell the myths, they put them to the test. 26 00:01:48,000 --> 00:01:50,000 I bet you're wondering why I'm standing here with a plunger. 27 00:01:50,000 --> 00:01:52,000 No, but I'm sure you're gonna tell me. 28 00:01:52,000 --> 00:01:55,000 Absolutely right. We have a plumbing myth. 29 00:01:55,000 --> 00:01:59,000 Picture, an old house and in that house is an old hot water heater. 30 00:01:59,000 --> 00:02:03,000 The hot water heater is neglected. It's beyond neglected. 31 00:02:03,000 --> 00:02:05,000 In fact, so badly that it blows up. 32 00:02:05,000 --> 00:02:07,000 But it doesn't just blow up. 33 00:02:07,000 --> 00:02:11,000 No, this hot water heater blows up like a rocket shooting up through the roof of the house. 34 00:02:11,000 --> 00:02:14,000 Hundreds of feet into the air, landing 500 feet away. 35 00:02:14,000 --> 00:02:18,000 The fans are going nuts about this on the website. They want us to test it out. 36 00:02:18,000 --> 00:02:21,000 Sounds like fun to me. It gets me all steamed up just thinking about it. 37 00:02:22,000 --> 00:02:25,000 Water heaters are fitted with two main safety devices. 38 00:02:25,000 --> 00:02:30,000 A thermostat and emergency cutoff switch to prevent the water from overheating. 39 00:02:30,000 --> 00:02:35,000 And a temperature and pressure relief valve to release excessive pressure. 40 00:02:36,000 --> 00:02:40,000 To find out what needs to happen to make good water heaters go bad, 41 00:02:40,000 --> 00:02:45,000 Jamie and Adam are conducting scale tests using small six gallon tanks. 42 00:02:45,000 --> 00:02:50,000 We're going to set this thing up using instrumentation that monitors both temperature and pressure. 43 00:02:50,000 --> 00:02:54,000 Then we're going to make each component, each safety component of this water heater 44 00:02:54,000 --> 00:02:57,000 fail until we get the entire tank to fail. 45 00:02:57,000 --> 00:02:59,000 Anyone have to go to the bathroom? 46 00:02:59,000 --> 00:03:05,000 Improper installation or lack of regular maintenance can really cause the safety devices to fail. 47 00:03:05,000 --> 00:03:08,000 Jamie and Adam are just simplifying the process. 48 00:03:08,000 --> 00:03:13,000 This is the thermostat and the emergency cutoff switch, which the water heater normally comes with. 49 00:03:13,000 --> 00:03:17,000 We've taken it off. So we've got no emergency shut off. 50 00:03:17,000 --> 00:03:23,000 The TNP valve is now the only functioning safety device. So here's how it works. 51 00:03:23,000 --> 00:03:29,000 When heated inside a closed environment, water expands and causes an increase in pressure. 52 00:03:29,000 --> 00:03:35,000 If the temperature or pressure gets too high, the TNP valve opens. 53 00:03:35,000 --> 00:03:41,000 So in theory, once this thing reaches the pressure relief or the temperature relief valve activates that, 54 00:03:41,000 --> 00:03:44,000 we should just see it start to spew some water. 55 00:03:44,000 --> 00:03:49,000 So people don't get scalded. The recommended set temperature for water heaters 56 00:03:49,000 --> 00:03:53,000 is well below boiling point of 212 degrees Fahrenheit. 57 00:03:53,000 --> 00:03:56,000 Look at how fast the temperature is rising, man. 58 00:03:56,000 --> 00:03:59,000 Yeah, it won't take long. 59 00:03:59,000 --> 00:04:06,000 When the water gets up to a dangerous 165 degrees, the TNP valve comes to the rescue. 60 00:04:06,000 --> 00:04:08,000 Oh, there it goes. 61 00:04:08,000 --> 00:04:12,000 Really? Oh, yeah, look, it's spewing. That's what it's supposed to do. 62 00:04:13,000 --> 00:04:15,000 That's better. 63 00:04:16,000 --> 00:04:20,000 For their next test, they're really putting themselves in hot water. 64 00:04:20,000 --> 00:04:21,000 What's next? 65 00:04:21,000 --> 00:04:28,000 Well, next, I think we pull the TNP valve and we start the final failure analysis test 66 00:04:28,000 --> 00:04:32,000 in which nobody approaches this bunker until we hear boom or all clear. 67 00:04:32,000 --> 00:04:35,000 Now, you might wonder exactly how that's going to happen in real life, 68 00:04:35,000 --> 00:04:37,000 and I'm going to play it out for you. 69 00:04:37,000 --> 00:04:42,000 A homeowner looks at his hot water heater and sees that there's this thing sticking out in a pipe 70 00:04:42,000 --> 00:04:46,000 that doesn't go anywhere, and he thinks, well, maybe that's from some old plumbing. 71 00:04:46,000 --> 00:04:50,000 It's dripping water, too, so I'll just cap it, stop it from dripping water. 72 00:04:50,000 --> 00:04:53,000 It's happened all the time. 73 00:04:53,000 --> 00:04:57,000 Removing the TNP valve could cause a serious explosion, 74 00:04:57,000 --> 00:05:04,000 so Jamie rigs up an external emergency release so they can defuse the system immediately. 75 00:05:04,000 --> 00:05:06,000 Are we live? We're live. 76 00:05:06,000 --> 00:05:08,000 All right, let's get everyone in the safety zone. 77 00:05:08,000 --> 00:05:10,000 The pressure slowly builds. 78 00:05:10,000 --> 00:05:15,000 Normally, a TNP valve is set to release at about 150 psi. 79 00:05:15,000 --> 00:05:18,000 Now, the sky's the limit. 80 00:05:19,000 --> 00:05:21,000 This is excruciating. 81 00:05:21,000 --> 00:05:24,000 Tell me about it. 400 psi. 82 00:05:24,000 --> 00:05:27,000 250 degrees Fahrenheit. 83 00:05:27,000 --> 00:05:33,000 Both the temperature and the psi are climbing steadily when all of a sudden... 84 00:05:33,000 --> 00:05:38,000 Whoa! We just lost pressure. We lost half of our pressure there. 85 00:05:38,000 --> 00:05:42,000 Something in the system is causing the pressure to drop rapidly. 86 00:05:42,000 --> 00:05:49,000 We're at 300 degrees Fahrenheit. I think we're losing pressure somewhere we can't see, and we've just got to abort. 87 00:05:49,000 --> 00:05:52,000 All right, well, we'll pull the valve. That's what it's for. 88 00:05:52,000 --> 00:05:54,000 All right, let's do it. 89 00:05:54,000 --> 00:05:56,000 Jamie triggers his emergency release. 90 00:05:57,000 --> 00:06:03,000 When water that's been heated beyond boiling point hits air, it turns instantly into vapor. 91 00:06:03,000 --> 00:06:06,000 Great for opening those pores. 92 00:06:07,000 --> 00:06:10,000 Okay, that is indicating it's fully depressured. 93 00:06:10,000 --> 00:06:14,000 The PSI gauge just failed. I don't know why, but the main thing is, 94 00:06:14,000 --> 00:06:18,000 neither Jamie or I feel comfortable doing the test here in the bunker anymore. 95 00:06:18,000 --> 00:06:20,000 After watching the amount of steam that came out, 96 00:06:20,000 --> 00:06:23,000 knowing how much pressure it takes to make a tank blow, 97 00:06:23,000 --> 00:06:25,000 we just want to be far away from this. 98 00:06:25,000 --> 00:06:31,000 The pent-up fury inside this tiny tank has got the guys running for cover. 99 00:06:31,000 --> 00:06:32,000 We need more room for sure. 100 00:06:32,000 --> 00:06:34,000 Let's pack up and move it out. 101 00:06:34,000 --> 00:06:35,000 Okay. 102 00:06:44,000 --> 00:06:47,000 Okay, guys, the next one is as American as baseball and apple pie. 103 00:06:47,000 --> 00:06:49,000 It's myths about blue jeans. 104 00:06:49,000 --> 00:06:51,000 Oh! 105 00:06:51,000 --> 00:06:53,000 Blue jean myths. That'll be cool. 106 00:06:53,000 --> 00:06:58,000 Since their creation during the rough and tumble days of the American Wild West, 107 00:06:58,000 --> 00:07:02,000 no one item of clothing has meant so much to so many. 108 00:07:02,000 --> 00:07:07,000 Practical, synonymous with rebellion, sexy and cool, 109 00:07:07,000 --> 00:07:12,000 it's no wonder legends about jeans are bursting at the seams. 110 00:07:12,000 --> 00:07:13,000 What's the first myth? 111 00:07:13,000 --> 00:07:17,000 A cowboy falls off his horse and gets dragged by it, 112 00:07:17,000 --> 00:07:22,000 and the friction that's created actually causes the jeans to catch on fire. 113 00:07:22,000 --> 00:07:25,000 Okay, that has Tori written all over it. 114 00:07:25,000 --> 00:07:27,000 Why does it have me written all over it? 115 00:07:27,000 --> 00:07:30,000 Yee-haw! 116 00:07:30,000 --> 00:07:37,000 To get this tail off and running and to get the chance to talk like this, 117 00:07:37,000 --> 00:07:42,000 the team hightails it over to the groundy ranch in Red Bluff, California. 118 00:07:42,000 --> 00:07:44,000 Tori is going to be playing cowboy, 119 00:07:44,000 --> 00:07:48,000 so he gets himself kitted up in full body padding. 120 00:07:48,000 --> 00:07:53,000 While Carrie and Grant chat with renowned stockman John. 121 00:07:53,000 --> 00:07:55,000 So how do you get yourself in trouble? 122 00:07:55,000 --> 00:07:57,000 I mean, does your foot get caught in the stirrup? 123 00:07:57,000 --> 00:07:59,000 Does it get caught in the rains? 124 00:07:59,000 --> 00:08:00,000 I mean, how do you get dragged? 125 00:08:00,000 --> 00:08:02,000 The common thing is being caught in the stirrup, 126 00:08:02,000 --> 00:08:04,000 and in the old days being caught in the rope, 127 00:08:04,000 --> 00:08:06,000 and the rope would hang on to you long enough, 128 00:08:06,000 --> 00:08:10,000 or it would actually close in on you while it was wrapped around the saddle horn, 129 00:08:10,000 --> 00:08:12,000 and then just drag you off. 130 00:08:12,000 --> 00:08:17,000 With John being a former rodeo rider, Grant asks the burning question. 131 00:08:17,000 --> 00:08:20,000 John, have your jeans ever caught fire? 132 00:08:20,000 --> 00:08:26,000 Not... I could have really gone with a good one there, alright. 133 00:08:26,000 --> 00:08:27,000 Whatever you want. 134 00:08:27,000 --> 00:08:32,000 Well, I was going to tell a story one time, but, you know, my pants have been on fire, 135 00:08:32,000 --> 00:08:34,000 but not on fire. 136 00:08:34,000 --> 00:08:37,000 Seems like John's not one to tell tales. 137 00:08:37,000 --> 00:08:40,000 But someone else on the ranch sure is. 138 00:08:40,000 --> 00:08:44,000 Okay, so the ranch actually has a psychic horse. 139 00:08:44,000 --> 00:08:50,000 This is Pistol, and Pistol's going to be able to tell me to predict what's going to happen today. 140 00:08:50,000 --> 00:08:53,000 Is this a dangerous thing for us to do? 141 00:08:53,000 --> 00:08:55,000 Yeah. 142 00:08:55,000 --> 00:08:57,000 I knew it. 143 00:08:57,000 --> 00:08:58,000 I knew it. 144 00:08:58,000 --> 00:09:01,000 Are the jeans going to catch fire? 145 00:09:01,000 --> 00:09:04,000 Yes? No. 146 00:09:04,000 --> 00:09:06,000 Not sure. Okay. 147 00:09:06,000 --> 00:09:10,000 By Pistol's reckoning, things could go either way. 148 00:09:10,000 --> 00:09:14,000 So to find out for sure, let's get this myth saddled up. 149 00:09:14,000 --> 00:09:21,000 Now, Tori's weight represents a downward force that's pushing the jeans onto the ground, 150 00:09:21,000 --> 00:09:27,000 and as the horse drags him along, the friction there is going to build up 151 00:09:27,000 --> 00:09:32,000 and hopefully cause the jeans to spontaneously combust. 152 00:09:32,000 --> 00:09:38,000 Faced with the bottom line, Tori's starting to feel all alone on the wide open plane. 153 00:09:38,000 --> 00:09:41,000 In the shop, they're like, oh, you're going to get dragged behind a horse, 154 00:09:41,000 --> 00:09:43,000 and I'm like, yeah, that sounds fun. 155 00:09:43,000 --> 00:09:49,000 But then you get out here and you go, God, this seems like a really stupid idea. 156 00:09:49,000 --> 00:09:54,000 And I'm starting to get that feeling more than that sounds like it's going to be fun. 157 00:09:54,000 --> 00:10:00,000 Next, Denim Desperado Tori literally puts his behind on the line. 158 00:10:01,000 --> 00:10:08,000 And soon, the guys find out if a water heater is really a rocket in disguise. 159 00:10:19,000 --> 00:10:23,000 The fans want to get the down low on this classic spaghetti western scenario. 160 00:10:23,000 --> 00:10:26,000 If you're dragged along the ground by an out of control horse, 161 00:10:26,000 --> 00:10:31,000 can the friction cause your jeans to catch fire? 162 00:10:32,000 --> 00:10:35,000 Tori is trying this Saturday matinee myth for real, 163 00:10:35,000 --> 00:10:39,000 but he's finding out it's a potential minefield. 164 00:10:39,000 --> 00:10:45,000 I'm looking around and I'm seeing rocks and I'm seeing horse dung. 165 00:10:45,000 --> 00:10:49,000 Not only is it going to hurt, it's going to be very, very unpleasant. 166 00:10:49,000 --> 00:10:56,000 To reduce the hazards, Tori is decked out in top to toe denim with a padded safety suit underneath. 167 00:10:56,000 --> 00:10:58,000 Fashion please. 168 00:10:58,000 --> 00:11:01,000 Top 10 cardinal rules, denim on denim, nope. 169 00:11:01,000 --> 00:11:04,000 And paramedics are on site. 170 00:11:04,000 --> 00:11:09,000 Expert cowgirl, Neela will be riding pistol, the psychic horse. 171 00:11:09,000 --> 00:11:12,000 Wow, this ropes a lot shorter than I thought it was going to be. 172 00:11:12,000 --> 00:11:18,000 To calculate the hotness of Tori's rear, the team has got some specialized equipment. 173 00:11:18,000 --> 00:11:24,000 We have an infrared surface thermometer, so we'll measure how hot the jeans are before the run. 174 00:11:24,000 --> 00:11:29,000 103.5 and compare that to how hot they are after it. 175 00:11:31,000 --> 00:11:34,000 And I'll just be carrying this just in case. 176 00:11:34,000 --> 00:11:40,000 Stretched out 25 feet from pistol's back legs, Tori should be out of kicking range. 177 00:11:41,000 --> 00:11:43,000 Kidding out. 178 00:11:44,000 --> 00:11:49,000 Okay, you got to be on your back. 179 00:11:49,000 --> 00:11:57,000 As Tori is pulled across the ground, he realizes that being a movie stuntman is not as glamorous as he once thought. 180 00:11:57,000 --> 00:11:59,000 Oh, he had a patch of dung there. 181 00:11:59,000 --> 00:12:01,000 I was just trying to hold on to the rope. 182 00:12:01,000 --> 00:12:04,000 I was hoping that the horse would stop soon. 183 00:12:04,000 --> 00:12:07,000 I just kind of kept my eyes closed and my mouth shut. 184 00:12:07,000 --> 00:12:10,000 Tori's cheeks clock up some serious speed. 185 00:12:10,000 --> 00:12:13,000 All right, we're topping out at 20 miles an hour. 186 00:12:13,000 --> 00:12:16,000 But they don't even generate a puff of smoke. 187 00:12:16,000 --> 00:12:19,000 Okay, flip over, flip over. 188 00:12:19,000 --> 00:12:21,000 Okay, got it. 189 00:12:21,000 --> 00:12:22,000 That was great. 190 00:12:22,000 --> 00:12:24,000 Can we do that again? 191 00:12:24,000 --> 00:12:26,000 116.5. 192 00:12:26,000 --> 00:12:31,000 Post run, Tori's posterior temperature has increased by 13 degrees. 193 00:12:31,000 --> 00:12:34,000 Do you feel any heat in your pants? 194 00:12:34,000 --> 00:12:35,000 Yeah, definitely. 195 00:12:35,000 --> 00:12:40,000 The friction did add some heat, but I mean, these pants aren't smoking. 196 00:12:40,000 --> 00:12:43,000 Then let's ride again. 197 00:12:43,000 --> 00:12:44,000 Round two. 198 00:12:44,000 --> 00:12:47,000 Drag that no good varmin out of town. 199 00:12:47,000 --> 00:12:48,000 Pistol. 200 00:12:50,000 --> 00:12:51,000 At a quicker pace. 201 00:12:51,000 --> 00:12:53,000 They're going way faster this time. 202 00:12:54,000 --> 00:12:57,000 Tori and the dung are really flying. 203 00:12:57,000 --> 00:13:00,000 Oh my God, they're topping it 30. 204 00:13:00,000 --> 00:13:02,000 I sure hope he doesn't have a date tonight. 205 00:13:02,000 --> 00:13:05,000 This time, we went a little bit faster. 206 00:13:05,000 --> 00:13:06,000 A lot faster, I felt like. 207 00:13:06,000 --> 00:13:08,000 I felt like I was bouncing around a lot. 208 00:13:08,000 --> 00:13:10,000 My head was going all over the place. 209 00:13:10,000 --> 00:13:14,000 When his gluteus maximus finally grinds to a halt, 210 00:13:14,000 --> 00:13:18,000 our vigilant fanny assessor rushes in. 211 00:13:18,000 --> 00:13:20,000 It's 145.5 degrees. 212 00:13:20,000 --> 00:13:21,000 Whoa. 213 00:13:21,000 --> 00:13:23,000 So it increased to 34 degrees. 214 00:13:23,000 --> 00:13:25,000 Still didn't catch on fire. 215 00:13:25,000 --> 00:13:26,000 And that's kind of what I figured. 216 00:13:26,000 --> 00:13:30,000 I figured the jeans were just going to tear away before they caught on fire. 217 00:13:30,000 --> 00:13:34,000 Tori could sell his distressed denim for a fortune, 218 00:13:34,000 --> 00:13:37,000 but fire from friction was fiction. 219 00:13:37,000 --> 00:13:41,000 Tori did experience an increase in temperature of his clothing, 220 00:13:41,000 --> 00:13:43,000 but he did not burst in the flame. 221 00:13:43,000 --> 00:13:47,000 Both the jacket and the jeans are safe for now. 222 00:13:47,000 --> 00:13:50,000 But this myth isn't done and dusted yet. 223 00:13:50,000 --> 00:13:54,000 Teen Tail End has some final tests to rustle up. 224 00:13:55,000 --> 00:13:59,000 Explosion Danger 225 00:13:59,000 --> 00:14:04,000 Explosion Danger lurks in thousands of typical hot water heater installations 226 00:14:04,000 --> 00:14:11,000 because the great majority have either improper protection or no protection at all. 227 00:14:11,000 --> 00:14:18,000 Is the tale of the water heater rocket really true or just over the top scare tactics? 228 00:14:19,000 --> 00:14:25,000 To find out, Jamie and Adam have arrived at the wide open spaces of Alameda Naval Base. 229 00:14:25,000 --> 00:14:30,000 It may help you to think about this in terms of just a pure release of energy. 230 00:14:30,000 --> 00:14:35,000 All we're doing is putting energy into the water heater in the form of electricity converted to heat. 231 00:14:35,000 --> 00:14:38,000 We're not letting that energy out in any way. 232 00:14:38,000 --> 00:14:41,000 Now the difference between a rocket and a bomb, 233 00:14:41,000 --> 00:14:44,000 a bomb releases all of its energy in every direction at once, 234 00:14:44,000 --> 00:14:49,000 and a rocket releases all of its energy over a little bit longer period of time in one single direction. 235 00:14:49,000 --> 00:14:51,000 And that's what we're looking for here. 236 00:14:51,000 --> 00:14:55,000 The same as their scale tests, they're using a six gallon tank. 237 00:14:55,000 --> 00:15:02,000 And to recreate real life circumstances of shoddy installation and neglect have made a few adjustments. 238 00:15:02,000 --> 00:15:06,000 The electronic cutoff switches and thermostats, gone. 239 00:15:06,000 --> 00:15:08,000 The temperature and pressure valve, gone. 240 00:15:08,000 --> 00:15:12,000 The power from a remote generator is switched on. 241 00:15:12,000 --> 00:15:17,000 Okay, Adam, we're live. We're hooked up. We're running about 25 amps. 242 00:15:17,000 --> 00:15:20,000 So everybody be on alert. Over. 243 00:15:20,000 --> 00:15:23,000 And our little heater has his moment in the sun. 244 00:15:23,000 --> 00:15:26,000 Well, as far as I can tell, everything's good to go. 245 00:15:26,000 --> 00:15:28,000 I hope we get it to blow this time. 246 00:15:28,000 --> 00:15:29,000 Yep. 247 00:15:29,000 --> 00:15:32,000 I'm tired of watching a heater not do anything. 248 00:15:32,000 --> 00:15:34,000 Third time's a charm. 249 00:15:34,000 --> 00:15:42,000 In a healthy appliance, the cutoff switch would activate before boiling point and the pressure release valve at 150 psi. 250 00:15:42,000 --> 00:15:47,000 But our patient is sick and his temperatures rising rapidly. 251 00:15:47,000 --> 00:15:52,000 All right. So we're at seven minutes, almost 40 psi and 250 degrees Fahrenheit. 252 00:15:52,000 --> 00:15:56,000 270 degrees, 53 psi. 253 00:15:56,000 --> 00:16:03,000 Okay, we're at 20 minutes, 370 degrees and 190 psi. 254 00:16:04,000 --> 00:16:08,000 Suddenly his fever breaks. 255 00:16:08,000 --> 00:16:11,000 That's a failure, but that's not an explosion. 256 00:16:11,000 --> 00:16:13,000 It was pretty spectacular. 257 00:16:13,000 --> 00:16:19,000 This thing bathed in a cloud of hot scalding steam and 300, 400 degree water. 258 00:16:19,000 --> 00:16:22,000 It's ludicrously dangerous. 259 00:16:22,000 --> 00:16:28,000 Six gallons of water turned into 9,600 gallons of fishing vapor. 260 00:16:28,000 --> 00:16:33,000 But even with all that force, the tank didn't go for a ride. 261 00:16:33,000 --> 00:16:35,000 Let's get a bigger heater out here. Try this again. 262 00:16:35,000 --> 00:16:37,000 Okay. Let's do it. 263 00:16:37,000 --> 00:16:43,000 A bigger tank may give the guys the heave-ho they need. 264 00:16:43,000 --> 00:16:46,000 Coming right up, besides looking killer. 265 00:16:46,000 --> 00:16:48,000 Oh, those are good. 266 00:16:48,000 --> 00:16:50,000 Can tight jeans kill you? 267 00:16:50,000 --> 00:16:55,000 And soon you'll never look at your water heater the same way again. 268 00:17:03,000 --> 00:17:10,000 All right. Death by shrinkage. 269 00:17:10,000 --> 00:17:15,000 This is the one where the woman puts on a very tight pair of jeans and sits in a bathtub for six hours. 270 00:17:15,000 --> 00:17:17,000 Yeah, I've heard that's how you get the perfect fit. 271 00:17:17,000 --> 00:17:19,000 However, they end up killing her. 272 00:17:19,000 --> 00:17:22,000 Oh, maybe not the perfect fit. 273 00:17:22,000 --> 00:17:25,000 This is a fan-side denim demand. 274 00:17:25,000 --> 00:17:31,000 A woman trying to get her jeans to fit just right sat in a hot bath for six hours. 275 00:17:31,000 --> 00:17:35,000 The heat caused her jeans to shrink and legs to swell. 276 00:17:35,000 --> 00:17:38,000 And the pressure cut off her blood circulation. 277 00:17:38,000 --> 00:17:40,000 Then it was curtains. 278 00:17:40,000 --> 00:17:46,000 To find out how this Death by Denim scenario might be possible, Carrie has an appointment. 279 00:17:46,000 --> 00:17:47,000 Hi. 280 00:17:47,000 --> 00:17:53,000 Dr. Edward Kirsch, MD, explains why constriction on the legs can be harmful to your health. 281 00:17:53,000 --> 00:17:56,000 So, is this even possible? 282 00:17:56,000 --> 00:17:59,000 Well, I hate to say that it is possible. 283 00:17:59,000 --> 00:18:00,000 Really? 284 00:18:00,000 --> 00:18:03,000 Really, because I do love tight jeans. 285 00:18:03,000 --> 00:18:06,000 But there is the possibility that you could do yourself some damage. 286 00:18:06,000 --> 00:18:10,000 There are two types of circulations in the legs. 287 00:18:10,000 --> 00:18:12,000 One is the arterial circulation. 288 00:18:12,000 --> 00:18:17,000 That's the high pressure circulation of blood flowing down into your legs. 289 00:18:17,000 --> 00:18:20,000 But once that's done, the blood has to come back up. 290 00:18:20,000 --> 00:18:23,000 That's a low pressure situation. 291 00:18:23,000 --> 00:18:25,000 You could create a clot. 292 00:18:25,000 --> 00:18:32,000 Then that could travel back up and pit your lungs and produce something called a pulmonary embolism. 293 00:18:32,000 --> 00:18:34,000 You mean like DVTs that can really kill you? 294 00:18:34,000 --> 00:18:35,000 Exactly. 295 00:18:35,000 --> 00:18:38,000 DVT and it can be a fatal occurrence. 296 00:18:38,000 --> 00:18:46,000 Armed with her alarming information, it's back to M7 to recreate this potentially fatal bath time scene. 297 00:18:46,000 --> 00:18:47,000 I'm ready. 298 00:18:47,000 --> 00:18:52,000 Using Grant as the model, their first task is to make a realistic pair of jeans. 299 00:18:52,000 --> 00:18:55,000 A realistic pair of fake human legs. 300 00:18:55,000 --> 00:18:58,000 Jim Morrison, eat your heart out. 301 00:19:01,000 --> 00:19:02,000 Okay, I'm sorry. 302 00:19:02,000 --> 00:19:05,000 What I need to do is make a cast of his legs. 303 00:19:05,000 --> 00:19:08,000 We're going to fill it with a material that's similar to flesh. 304 00:19:08,000 --> 00:19:15,000 We're going to put veins in there so that way we can see if those jeans do start constricting around those legs, it cuts off the blood circulation. 305 00:19:15,000 --> 00:19:16,000 About those giants. 306 00:19:16,000 --> 00:19:17,000 Yeah. 307 00:19:17,000 --> 00:19:19,000 When the plaster hardens, 308 00:19:21,000 --> 00:19:28,000 Tori continues making the molds while Grant rigs up an old tub with a blood pumping system. 309 00:19:28,000 --> 00:19:35,000 It starts out with an aquarium pump with this vessel and it will be filled with actual blood. 310 00:19:35,000 --> 00:19:40,000 Blood's going to be pumped through this tube to valve number one, which regulates the pressure. 311 00:19:40,000 --> 00:19:45,000 Now this goes into the tube that will lead to the leg, which is inside the tub. 312 00:19:45,000 --> 00:19:48,000 Jeans are constricting. 313 00:19:48,000 --> 00:19:51,000 Finally, comes out here. 314 00:19:51,000 --> 00:19:57,000 Meanwhile, Tori inserts surgical tubing that will act as the low pressure veins in each limb. 315 00:19:57,000 --> 00:20:02,000 He places them two inches below the surface, just like in the human body. 316 00:20:02,000 --> 00:20:05,000 Then he fills up the hollows with permigill. 317 00:20:05,000 --> 00:20:10,000 Now to dress Grant's legs in a pair of new, shrinkable jeans. 318 00:20:10,000 --> 00:20:12,000 There's no way of doing this without it looking creepy. 319 00:20:12,000 --> 00:20:13,000 I know. 320 00:20:13,000 --> 00:20:17,000 Next, they place the legs into the tub and attach them to the valves. 321 00:20:17,000 --> 00:20:22,000 Then, Carrie and Grant fill up the reservoir for the veins with pig's blood. 322 00:20:22,000 --> 00:20:26,000 Grant is like Dr. Frankenstein. 323 00:20:26,000 --> 00:20:28,000 He's a genius. 324 00:20:28,000 --> 00:20:30,000 A demented genius. 325 00:20:30,000 --> 00:20:37,000 Grant checks the flow to make sure it's running through the veins at the normal human rate of about a liter a minute. 326 00:20:37,000 --> 00:20:41,000 Alright, 475 milliliters. 327 00:20:41,000 --> 00:20:46,000 So this, from now on, is going to be our level of regular flow. 328 00:20:46,000 --> 00:20:56,000 If there's any deviation from this, then we'll know that the jeans are causing constriction and possibly potential death. 329 00:21:01,000 --> 00:21:03,000 So I guess this would be a good time to explain. 330 00:21:03,000 --> 00:21:05,000 Why do jeans shrink? 331 00:21:05,000 --> 00:21:07,000 Yeah, shrinkage is all about chemical bonding. 332 00:21:07,000 --> 00:21:09,000 Your jeans are composed of cotton fibers. 333 00:21:09,000 --> 00:21:12,000 The cotton fibers are composed of molecules. 334 00:21:12,000 --> 00:21:16,000 The molecules join together to form long chains called polymers. 335 00:21:16,000 --> 00:21:23,000 The polymers themselves are quite strong, but the forces that hold them next to each other, they're much weaker hydrogen bonds. 336 00:21:23,000 --> 00:21:24,000 That's right. 337 00:21:24,000 --> 00:21:29,000 And when your jeans are first made, the cotton fibers are spun and stretched out on a loom. 338 00:21:29,000 --> 00:21:33,000 It's a huge amount of stress to put on those hydrogen bonds and many of them break. 339 00:21:33,000 --> 00:21:38,000 But new ones are formed in their place, but keeping the cotton fibers in that stressed out state. 340 00:21:38,000 --> 00:21:46,000 And the thing is, the jeans want to return to their natural or lack state, but it requires a large amount of energy to break the hydrogen bonds. 341 00:21:46,000 --> 00:21:52,000 And throwing your clothes in the washing machine with the heat and the detergent and the dryer, even a hot bath, will do just that. 342 00:21:52,000 --> 00:21:56,000 And the result of broken hydrogen bonds is shrinkage. 343 00:21:56,000 --> 00:22:03,000 In the team's shrinking jeans of death bath test, the final step is to fill the tub with piping hot water. 344 00:22:03,000 --> 00:22:10,000 Time for a nice relaxing bath for six hours, and possibly all eternity. 345 00:22:13,000 --> 00:22:16,000 Coming up, Grant gets a lethal new look. 346 00:22:16,000 --> 00:22:18,000 We're going to have to have potatoes life. 347 00:22:18,000 --> 00:22:23,000 But next, Jamie and Adam become water heater astronauts. 348 00:22:23,000 --> 00:22:24,000 Wow. 349 00:22:24,000 --> 00:22:25,000 The boosters were separated. 350 00:22:25,000 --> 00:22:26,000 Yeah, exactly. 351 00:22:36,000 --> 00:22:43,000 Can an ordinary everyday water heater become a rocket so powerful it can blast through a building? 352 00:22:43,000 --> 00:22:47,000 So far, Jamie and Adam have let off a lot of steam. 353 00:22:47,000 --> 00:22:48,000 There we go. 354 00:22:48,000 --> 00:22:49,000 Whoa! 355 00:22:49,000 --> 00:22:53,000 But couldn't send a small six-gallon tank skyward. 356 00:22:55,000 --> 00:23:02,000 This time, they're using a 30-gallon tank and have a new strategy to add some extra thrust. 357 00:23:02,000 --> 00:23:04,000 I'd like to fill this 80% full. 358 00:23:04,000 --> 00:23:05,000 Okay. 359 00:23:05,000 --> 00:23:07,000 So let's put 24 gallons in here. 360 00:23:07,000 --> 00:23:12,000 We may find this like perfect relationship between water and steam for getting the maximum amount of pressure. 361 00:23:12,000 --> 00:23:18,000 In daily life, a water heater is an appliance nobody normally takes any notice of. 362 00:23:18,000 --> 00:23:25,000 So to mimic one in serious neglect, Jamie and Adam disable its safety devices. 363 00:23:25,000 --> 00:23:30,000 Once again, it's time for launch and to man bunker boiling over. 364 00:23:30,000 --> 00:23:34,000 By the time we're done with this, we'll actually know what we're doing. 365 00:23:34,000 --> 00:23:38,000 At least one of our crew seems to think they'll get it this time. 366 00:23:38,000 --> 00:23:42,000 Never has a single water heater been covered from so many angles. 367 00:23:42,000 --> 00:23:47,000 Maybe all this attention will raise them from their D-list apparatus status. 368 00:23:47,000 --> 00:23:50,000 Okay, now we're at 160 psi. 369 00:23:50,000 --> 00:23:52,000 It's officially a no-go zone. 370 00:23:52,000 --> 00:23:57,000 Anything goes from here on in, so stay clear. 371 00:23:57,000 --> 00:24:03,000 These pressure vessel ones are really difficult because they involve tons and tons of waiting and waiting. 372 00:24:03,000 --> 00:24:04,000 It's excruciating. 373 00:24:04,000 --> 00:24:05,000 It's really boring. 374 00:24:05,000 --> 00:24:08,000 This is killing me. 375 00:24:08,000 --> 00:24:16,000 After an excruciating 50-minute wait, they achieve lift-off. 376 00:24:16,000 --> 00:24:17,000 Wow! 377 00:24:17,000 --> 00:24:22,000 That was at about 350 psi. 378 00:24:22,000 --> 00:24:27,000 The heater travels in a straight trajectory into the air so high, 379 00:24:27,000 --> 00:24:33,000 he could order a pizza while you're waiting for it to come back down. 380 00:24:33,000 --> 00:24:35,000 Wow, no, it just came down. 381 00:24:35,000 --> 00:24:36,000 There it is. 382 00:24:36,000 --> 00:24:40,000 It came down like 40 seconds later. 383 00:24:40,000 --> 00:24:42,000 Oh my God. 384 00:24:42,000 --> 00:24:45,000 This was a really serious explosion. 385 00:24:46,000 --> 00:24:49,000 I mean, even though this is just a water heater, 386 00:24:49,000 --> 00:24:53,000 you would be in danger of shrapnel hitting you. 387 00:24:53,000 --> 00:24:55,000 You could get severe burns from the steam, 388 00:24:55,000 --> 00:24:59,000 and not only that, the shockwave was really significant. 389 00:24:59,000 --> 00:25:02,000 I mean, the whole area was reverberating. 390 00:25:04,000 --> 00:25:09,000 Adams just seen the most beautiful thing we've ever filmed on the high speed. 391 00:25:09,000 --> 00:25:14,000 Oh, that's one of my favorite booms we've ever done. 392 00:25:14,000 --> 00:25:16,000 Just water and pressure. 393 00:25:16,000 --> 00:25:20,000 Look up top, you can see the tank breaking through the casing. 394 00:25:20,000 --> 00:25:23,000 There it goes. 395 00:25:27,000 --> 00:25:28,000 Wow. 396 00:25:28,000 --> 00:25:30,000 The boosters were separated. 397 00:25:30,000 --> 00:25:31,000 Yeah, exactly. 398 00:25:31,000 --> 00:25:38,000 But there's one even more spectacular way for the guys to push this myth through the roof. 399 00:25:38,000 --> 00:25:41,000 Put the water heater into the house. 400 00:25:41,000 --> 00:25:42,000 Do we have a house? 401 00:25:42,000 --> 00:25:43,000 No, we've got to build one. 402 00:25:43,000 --> 00:25:44,000 You ready? 403 00:25:45,000 --> 00:25:46,000 Damn. 404 00:26:12,000 --> 00:26:15,000 This is where we're at with the shrinking genes of death. 405 00:26:15,000 --> 00:26:17,000 We have our fake legs with our veins running through them, 406 00:26:17,000 --> 00:26:19,000 and the bloods running through the veins. 407 00:26:19,000 --> 00:26:23,000 We have the genes on the legs, and the legs are submerged in the hot bathtub water. 408 00:26:23,000 --> 00:26:25,000 We're going to leave them there for six hours, 409 00:26:25,000 --> 00:26:28,000 because if the genes are constricting and the blood flow slows down, 410 00:26:28,000 --> 00:26:30,000 it could potentially kill you. 411 00:26:30,000 --> 00:26:35,000 With unwashed, shrinkable genes able to constrict up to three inches in hot water, 412 00:26:35,000 --> 00:26:39,000 and the veins lying two inches beneath the surface of their legs, 413 00:26:39,000 --> 00:26:43,000 enough of a squeeze to slow the flow could be possible. 414 00:26:43,000 --> 00:26:44,000 We got a bleeder. 415 00:26:48,000 --> 00:26:52,000 You know, our researchers found a lot of interesting facts about tight clothing. 416 00:26:52,000 --> 00:26:57,000 In New Zealand, in 2006, a kid was trying to shrink his genes by wearing them in the bathtub. 417 00:26:57,000 --> 00:27:00,000 And to get them even tighter, he laid out in the sun wearing them. 418 00:27:00,000 --> 00:27:03,000 They got so tight, he couldn't get them off, and they had to rush them to the hospital. 419 00:27:03,000 --> 00:27:08,000 Yeah, actually, the doctors were saying that he was in danger of losing his legs. 420 00:27:08,000 --> 00:27:13,000 If you cut off circulation too long, the muscles can die within a matter of hours. 421 00:27:13,000 --> 00:27:17,000 It's a very real, very serious condition called compartment syndrome. 422 00:27:17,000 --> 00:27:20,000 Who knew tight clothes could be so dangerous? 423 00:27:20,000 --> 00:27:22,000 Maybe we should just go back to wearing fig leaves. 424 00:27:22,000 --> 00:27:25,000 As the team continues to monitor their tub test, 425 00:27:25,000 --> 00:27:29,000 it seems to be bringing out the creature of the night in Carrie. 426 00:27:29,000 --> 00:27:32,000 This myth is actually kind of beautiful to me. 427 00:27:32,000 --> 00:27:37,000 For some reason, I just think blood's really pretty, so this isn't grossing me out at all. 428 00:27:37,000 --> 00:27:40,000 It's just kind of a neat little blood fountain. 429 00:27:40,000 --> 00:27:46,000 But after a full six hours of constantly monitoring their neat little blood fountain, 430 00:27:46,000 --> 00:27:48,000 there's barely any change in the rate. 431 00:27:48,000 --> 00:27:52,000 And that means there's not enough constriction to kill. 432 00:27:52,000 --> 00:27:59,000 Well, we ran the blood through our veins and our mock legs for six hours. 433 00:27:59,000 --> 00:28:05,000 And unfortunately, or fortunately, we did not get any decrease in flow. 434 00:28:05,000 --> 00:28:10,000 And this was with stock shrinkable genes. 435 00:28:10,000 --> 00:28:16,000 The only way to try and ring some results out of this myth is to do it for real. 436 00:28:16,000 --> 00:28:17,000 So what's your weight size? 437 00:28:17,000 --> 00:28:19,000 Uh, 32. 438 00:28:19,000 --> 00:28:20,000 So 30. 439 00:28:20,000 --> 00:28:25,000 So Carrie goes to help Grant pick out a form-fitting pair of dentals. 440 00:28:25,000 --> 00:28:26,000 Oh, that was perfect. 441 00:28:26,000 --> 00:28:31,000 This is going to be an excruciating three-hour experience. 442 00:28:31,000 --> 00:28:36,000 Grant, you have no idea how excruciating. 443 00:28:36,000 --> 00:28:43,000 This isn't happening. 444 00:28:43,000 --> 00:28:45,000 Oh, those are good. 445 00:28:45,000 --> 00:28:51,000 Normally, the biggest worry about buying designer genes is the price, but not this time. 446 00:28:51,000 --> 00:28:59,000 My worries are the potential for death due to a blood clot forming in my leg 447 00:28:59,000 --> 00:29:02,000 because the genes have cut off my circulation. 448 00:29:02,000 --> 00:29:04,000 Other than that, it should be easy. 449 00:29:04,000 --> 00:29:11,000 Soon, Carrie, Tori and Grant discover if a muffin top is the worst effect of tight genes. 450 00:29:11,000 --> 00:29:13,000 But right after the break... 451 00:29:13,000 --> 00:29:25,000 A little steam batch. 452 00:29:25,000 --> 00:29:30,000 Since prehistoric times, friction has been used to set things aflame. 453 00:29:30,000 --> 00:29:36,000 But the fans want to know if this force can also set fire to your genes. 454 00:29:36,000 --> 00:29:46,000 To answer this burning question, Tori gravely had his denim clad derriere dragged along the ground by a galloping horse. 455 00:29:46,000 --> 00:29:49,000 But all he got was the manure wash glue. 456 00:29:49,000 --> 00:29:51,000 I think I've had enough. 457 00:29:51,000 --> 00:29:55,000 To reproduce the speed of a horse in full galloping stride, 458 00:29:55,000 --> 00:30:00,000 Tori sets up a belt-sanding rig to represent the bumpy surface of the ground. 459 00:30:00,000 --> 00:30:04,000 And to represent a human, he outfits a ham-hawk. 460 00:30:04,000 --> 00:30:09,000 I can honestly say I've never stuck a piece of pork in a pair of jeans. 461 00:30:09,000 --> 00:30:12,000 Their cool swine is secured in place. 462 00:30:12,000 --> 00:30:14,000 Then they take its temperature. 463 00:30:14,000 --> 00:30:18,000 69 degrees. Ready? Here we go. 464 00:30:18,000 --> 00:30:21,000 The ignition point of cotton is about 250 degrees. 465 00:30:21,000 --> 00:30:26,000 The belt sander provides a consistent surface that the denim can be graded across. 466 00:30:26,000 --> 00:30:29,000 Hopefully upping the friction factor. 467 00:30:29,000 --> 00:30:32,000 I can see the jeans are starting to fray. 468 00:30:32,000 --> 00:30:35,000 The smell of smoky bacon is in the air. 469 00:30:35,000 --> 00:30:38,000 Get some of this, man. You're missing out. 470 00:30:38,000 --> 00:30:41,000 But it's still not being cooked. 471 00:30:41,000 --> 00:30:44,000 Alright, shut it off. 472 00:30:44,000 --> 00:30:48,000 This is why cut-priced dermabrasion is never a good idea. 473 00:30:48,000 --> 00:30:51,000 We turned it into leather. 474 00:30:51,000 --> 00:30:53,000 Still only 138.5. 475 00:30:53,000 --> 00:30:57,000 138. It actually ripped through the jeans. 476 00:30:57,000 --> 00:31:01,000 The jeans are no longer in existence. 477 00:31:01,000 --> 00:31:03,000 Jeans are shredded. 478 00:31:03,000 --> 00:31:09,000 They've doubled their temperature increase from their experiment with Tori and pistol the psychic horse. 479 00:31:09,000 --> 00:31:12,000 However, your jeans are going to disintegrate before they catch on fire. 480 00:31:12,000 --> 00:31:17,000 Unless we've got something else that catches it on fire, it's not going to be friction. 481 00:31:17,000 --> 00:31:22,000 But nothing comes between the mythbusters and a result. 482 00:31:26,000 --> 00:31:29,000 Finally, they've got the look. 483 00:31:32,000 --> 00:31:36,000 And that, my friend, is what it takes to set your jeans on fire. 484 00:31:36,000 --> 00:31:37,000 Yeah. 485 00:31:37,000 --> 00:31:39,000 Torch. 486 00:31:42,000 --> 00:31:49,000 Can this kind of damage be caused by your water heater? 487 00:31:49,000 --> 00:31:57,000 To find out, Jamie and Adam have successfully launched a 30-gallon water heater 500 feet into the open air. 488 00:31:57,000 --> 00:32:03,000 Now, to really blow the lid off this myth. 489 00:32:03,000 --> 00:32:06,000 That hot water heater flew into the air. That's amazing. 490 00:32:06,000 --> 00:32:08,000 It wasn't contained. 491 00:32:08,000 --> 00:32:11,000 It doesn't tell us whether it would make it through a building or not. 492 00:32:11,000 --> 00:32:17,000 Well, and that's our next step, I think. Let's build a building around that hot water heater and get it to fail and see what happens. 493 00:32:17,000 --> 00:32:19,000 And we'll have to build the roof to code. 494 00:32:19,000 --> 00:32:21,000 Absolutely. I totally agree. 495 00:32:21,000 --> 00:32:24,000 Then we'll know if it happens in our building, it would happen in your house. 496 00:32:24,000 --> 00:32:26,000 I can't wait. 497 00:32:26,000 --> 00:32:34,000 Only the mythbusters would take delight in building a house from scratch in anticipation of destroying it. 498 00:32:35,000 --> 00:32:42,000 It's going to take me a few hours to build it, but you'll get to watch it in all of about 10, 15 seconds. 499 00:32:42,000 --> 00:32:45,000 So let's get this time-lapse started. 500 00:32:45,000 --> 00:32:50,000 First goes down the floor, which they tile in Deco-inspired black and white. 501 00:32:50,000 --> 00:32:54,000 Next, they unpack their shining centerpiece. 502 00:32:54,000 --> 00:32:56,000 Bada bing, bada boom. 503 00:32:56,000 --> 00:32:58,000 A 52-gallon water heater. 504 00:32:58,000 --> 00:33:02,000 This size would typically be used by a family of four. 505 00:33:02,000 --> 00:33:07,000 Once again, they disconnected safety devices as if it's faulty or needs a service. 506 00:33:07,000 --> 00:33:09,000 There we go. 507 00:33:09,000 --> 00:33:13,000 It does add a charming focal point to the room, doesn't it? 508 00:33:13,000 --> 00:33:17,000 Then they close it in with walls and windows. 509 00:33:17,000 --> 00:33:19,000 Here's hoping they're double glazed. 510 00:33:19,000 --> 00:33:22,000 Hi everybody, welcome to the Mythbusters Clubhouse. 511 00:33:22,000 --> 00:33:29,000 Now to create a typical water heater home scene with the lady of the house enjoying a relaxing bath. 512 00:33:29,000 --> 00:33:31,000 A little steam bath. 513 00:33:31,000 --> 00:33:37,000 Remember, their cozy cottage is no balsa wood and hobby glue construction. 514 00:33:37,000 --> 00:33:43,000 Jamie and Adam are building the roof to exact California code building regulations. 515 00:33:43,000 --> 00:33:46,000 The roof is lowered in place and secure. 516 00:33:46,000 --> 00:33:48,000 Now for the final touch. 517 00:33:48,000 --> 00:33:51,000 All right, everybody, we're going to paint this thing. 518 00:33:51,000 --> 00:33:56,000 You want to start from the bottom and move to the top and paint everything except the bottom. 519 00:33:56,000 --> 00:34:01,000 You want to start from the bottom and move to the top and paint everything except the black shingles. 520 00:34:01,000 --> 00:34:03,000 Everything you can see. 521 00:34:03,000 --> 00:34:05,000 Neatness does not count. 522 00:34:05,000 --> 00:34:11,000 It's not exactly a subtle shade, but salmon just doesn't say Mythbusters. 523 00:34:11,000 --> 00:34:20,000 Jamie and Adam's impressive construction skills have created a house fit for the likes of Little Red Riding Hood. 524 00:34:20,000 --> 00:34:23,000 It's almost a shame to make it go, whoa! 525 00:34:27,000 --> 00:34:30,000 Those jeans are so tight. 526 00:34:30,000 --> 00:34:32,000 They were clinging into her skin. 527 00:34:32,000 --> 00:34:38,000 Tight jeans look very foxy, but can they strangle the very life out of you? 528 00:34:38,000 --> 00:34:48,000 The theory is if you sit in a hot bath trying to get your jeans to shrink, the pressure could cut off your circulation, causing a blood clot that kills you. 529 00:34:48,000 --> 00:34:55,000 Grant is courageously offering his own legs to experiment on, but the team is taking no chances. 530 00:34:55,000 --> 00:34:57,000 Grant is going to be our guinea pig. 531 00:34:57,000 --> 00:35:06,000 He's going to put on the tight jeans, sit in a hot tub, but we brought him here to a hospital so in case anything goes wrong, if a clot starts forming, the doctors will be here. 532 00:35:06,000 --> 00:35:09,000 They'll be monitoring him, make sure that he doesn't die. 533 00:35:09,000 --> 00:35:14,000 First, Grant changes into his brand new, unwashed, shrinkable jeans. 534 00:35:14,000 --> 00:35:18,000 An unfortunate result of size denial is emerging already. 535 00:35:18,000 --> 00:35:22,000 A hot bath has been prepared for Grant to slip into. 536 00:35:22,000 --> 00:35:24,000 Do you want to back in and we'll just lower you down? 537 00:35:24,000 --> 00:35:27,000 It's nice. 538 00:35:27,000 --> 00:35:29,000 Nice. 539 00:35:29,000 --> 00:35:30,000 Yeah? 540 00:35:30,000 --> 00:35:31,000 Yeah. 541 00:35:31,000 --> 00:35:36,000 All he has to do is sit back, relax, and wait for any warning signs. 542 00:35:36,000 --> 00:35:39,000 Why is there all those air bubbles coming out of your pants? 543 00:35:39,000 --> 00:35:45,000 So how's he feeling so far? 544 00:35:45,000 --> 00:35:52,000 I have to say I'm feeling a little bit of discomfort in my stomach, but nothing that's unbearable. 545 00:35:52,000 --> 00:35:53,000 It's tight. 546 00:35:53,000 --> 00:36:00,000 No doubt about that, but I don't think it's life-threatening at this point. 547 00:36:00,000 --> 00:36:09,000 To make absolutely sure there are no blockages forming, medical technician Keith checks his condition using a Doppler machine. 548 00:36:09,000 --> 00:36:13,000 So if a clot was forming, what would it look like on that? 549 00:36:13,000 --> 00:36:19,000 In the veins, you would not be able to see the blue venous blood flow because it would just be obstructed. 550 00:36:19,000 --> 00:36:22,000 There would be no way of blood getting down or up. 551 00:36:22,000 --> 00:36:26,000 In the arteries, you would see just no flow. 552 00:36:26,000 --> 00:36:35,000 But fortunately, Grant's leg veins are flowing freely after six long hours of being submerged and continual monitoring throughout. 553 00:36:35,000 --> 00:36:36,000 How you doing, sir? 554 00:36:36,000 --> 00:36:37,000 Fantastic. 555 00:36:37,000 --> 00:36:39,000 This is a good day at work? 556 00:36:39,000 --> 00:36:41,000 Excellent day. 557 00:36:41,000 --> 00:36:44,000 Keith gives his final verdict on Grant's condition. 558 00:36:44,000 --> 00:36:46,000 Are you seeing constriction? 559 00:36:46,000 --> 00:36:49,000 No, it's got beautiful flow still. 560 00:36:49,000 --> 00:36:53,000 Absolutely no obstructions or restrictions. 561 00:36:53,000 --> 00:36:55,000 Are we going to have to amp potatoes' legs? 562 00:36:55,000 --> 00:36:57,000 I don't think you're going to have to. 563 00:36:57,000 --> 00:36:58,000 Well, that's good news. 564 00:36:58,000 --> 00:37:02,000 Now all they have to do is get Grant out of this denim shrink wrap. 565 00:37:02,000 --> 00:37:04,000 You know, you may have to cut me out of these. 566 00:37:04,000 --> 00:37:05,000 Let's see. 567 00:37:05,000 --> 00:37:06,000 That's what I've done. 568 00:37:06,000 --> 00:37:07,000 Oh, see how tight they are. 569 00:37:07,000 --> 00:37:09,000 Oh my God! 570 00:37:09,000 --> 00:37:11,000 Look how tight those are! 571 00:37:11,000 --> 00:37:14,000 They're capris now. 572 00:37:14,000 --> 00:37:19,000 So how are they going to summarize this gripping life-or-death jeans legend? 573 00:37:19,000 --> 00:37:21,000 Well, I guess this one's looking busted. 574 00:37:21,000 --> 00:37:24,000 Grant didn't die and we didn't have to amp-butate his legs. 575 00:37:24,000 --> 00:37:25,000 You sound a little disappointed. 576 00:37:25,000 --> 00:37:27,000 Yeah, I'm not going to lie. 577 00:37:27,000 --> 00:37:31,000 Well, we didn't have any loss of flow in either the fake Grant legs or the real Grant legs. 578 00:37:31,000 --> 00:37:38,000 Well, perhaps someone who wasn't in as peak physical condition as me might experience some loss of blood flow. 579 00:37:38,000 --> 00:37:42,000 Well, if that's the case, then we're going to have to test hundreds more people to really find out. 580 00:37:42,000 --> 00:37:50,000 Well, we know the DVT and Compartment Syndrome are very real conditions and constricting blood flow to your legs for a long period of time is never a good idea. 581 00:37:50,000 --> 00:37:51,000 It's okay, it wasn't your look anyway. 582 00:37:51,000 --> 00:37:52,000 Good. 583 00:37:52,000 --> 00:37:53,000 I'm willing to let go of the muffin top. 584 00:37:53,000 --> 00:37:56,000 Yes, but is the muffin top willing to let go of you? 585 00:38:01,000 --> 00:38:04,000 Next, Adam and Jamie try to raise the roof. 586 00:38:04,000 --> 00:38:06,000 It's kind of stressful on a regular basis. 587 00:38:06,000 --> 00:38:07,000 Can't be good. 588 00:38:07,000 --> 00:38:09,000 With a water heater. 589 00:38:09,000 --> 00:38:10,000 Look at that house! 590 00:38:10,000 --> 00:38:23,000 The buildup of steam under pressure can cause many things to go off. 591 00:38:23,000 --> 00:38:28,000 But how about a water heater bursting right through your house? 592 00:38:28,000 --> 00:38:36,000 To mimic a real life situation, the roof of the house has been constructed to California Building Code specifications. 593 00:38:36,000 --> 00:38:40,000 And the water heater contains no explosives. 594 00:38:40,000 --> 00:38:44,000 They turn on the power, hunker down and wait. 595 00:38:44,000 --> 00:38:45,000 Do you feel ready? 596 00:38:45,000 --> 00:38:47,000 Everyone's in position, cameras are all rolling. 597 00:38:47,000 --> 00:38:53,000 Yeah, we've got a nice little red house out there sitting there, you know, like everything's rosy. 598 00:38:53,000 --> 00:38:57,000 Rosy on the outside, but roasting on the inside. 599 00:38:57,000 --> 00:39:01,000 Okay, everybody, we're at 300 psi. 600 00:39:01,000 --> 00:39:04,000 That's twice the tank rating. 601 00:39:04,000 --> 00:39:05,000 Keep your eyes peeled. 602 00:39:05,000 --> 00:39:10,000 As the pressure inside the tank mounts, so does Jamie and Adam's heart rate. 603 00:39:10,000 --> 00:39:12,000 315 psi. 604 00:39:12,000 --> 00:39:14,000 Oh, this is killing me. 605 00:39:14,000 --> 00:39:15,000 320. 606 00:39:15,000 --> 00:39:16,000 Any second. 607 00:39:16,000 --> 00:39:18,000 325. 608 00:39:20,000 --> 00:39:22,000 This is excruciating. 609 00:39:22,000 --> 00:39:25,000 This kind of stress on a regular basis can't be good. 610 00:39:25,000 --> 00:39:27,000 No, shortening our lifespan. 611 00:39:27,000 --> 00:39:30,000 We're going to make it 350. 612 00:39:35,000 --> 00:39:40,000 Suddenly the heater launches and tears through the roof like its tissue. 613 00:39:40,000 --> 00:39:46,000 You could practically have a three course meal while you're waiting for it to come back down. 614 00:39:46,000 --> 00:39:50,000 Look at the house. 615 00:39:50,000 --> 00:39:51,000 What house? 616 00:39:51,000 --> 00:39:53,000 I don't see a house. 617 00:39:53,000 --> 00:39:56,000 I don't know what you're going to be talking about. 618 00:39:56,000 --> 00:39:58,000 This actually surprised me. 619 00:39:58,000 --> 00:40:01,000 The house was no hindrance whatsoever to the rocket. 620 00:40:01,000 --> 00:40:05,000 It probably would have gone through several houses like this before it stopped going. 621 00:40:05,000 --> 00:40:08,000 It's like a fairy tale come true. 622 00:40:08,000 --> 00:40:13,000 The water heater huffed, it puffed, and it blew the house down. 623 00:40:13,000 --> 00:40:17,000 It just goes to show you, you know, there's danger everywhere. 624 00:40:17,000 --> 00:40:21,000 Did you know what was lurking in your basement? 625 00:40:21,000 --> 00:40:25,000 The guys inspect what's left of their once charming home. 626 00:40:25,000 --> 00:40:29,000 The bottom of the tank went from concave to convex. 627 00:40:29,000 --> 00:40:33,000 Probably in a split second, there's a hole in the roof. 628 00:40:33,000 --> 00:40:37,000 It had to go through two layers of two by four trusses. 629 00:40:37,000 --> 00:40:40,000 And we didn't make that hole, and yet it totally did. 630 00:40:40,000 --> 00:40:44,000 And it did it without breaking any of the three windows in here. 631 00:40:44,000 --> 00:40:46,000 That's a rocket, my friend. 632 00:40:46,000 --> 00:40:50,000 Not a bomb. 633 00:40:50,000 --> 00:40:58,000 The trajectory in form of the 500 foot high rocket like blast is revealed on the high speed. 634 00:40:58,000 --> 00:41:06,000 I gotta say it's more interesting than an actual explosive explosion. 635 00:41:06,000 --> 00:41:11,000 Because the steam is just erupting everywhere and completely disintegrating. 636 00:41:11,000 --> 00:41:13,000 It's different. It's more elegant. 637 00:41:13,000 --> 00:41:19,000 Yes, it was like a lovely, delicate water heater ballet. But deadly. 638 00:41:19,000 --> 00:41:22,000 So researchers have found cases of this actually happening. 639 00:41:22,000 --> 00:41:27,000 Indeed, in 2000, outside of Burrito Shop's hot water heater exploded, 640 00:41:27,000 --> 00:41:32,000 went right through the roof, and apparently flew 439 feet into the air. 641 00:41:32,000 --> 00:41:36,000 And there was one in Minnesota where the water heater went through all the floors of the house, 642 00:41:36,000 --> 00:41:38,000 continued 150 feet in the air. 643 00:41:38,000 --> 00:41:42,000 And it was so bad that it knocked the house off its foundation and it had to be condemned. 644 00:41:42,000 --> 00:41:45,000 Two people were injured, killed a dog. 645 00:41:45,000 --> 00:41:46,000 Bad stuff. 646 00:41:46,000 --> 00:41:50,000 So the moral of the myth is, even though you use them daily, 647 00:41:50,000 --> 00:41:52,000 don't take your water heater for granted. 648 00:41:52,000 --> 00:41:55,000 Or there may not be a happy ending. 649 00:41:55,000 --> 00:41:57,000 And test your relief valve. 650 00:41:57,000 --> 00:42:00,000 So what I hope that people get out of this episode is, 651 00:42:00,000 --> 00:42:03,000 when they see that pipe sticking out of the water heater that doesn't go anywhere, 652 00:42:03,000 --> 00:42:06,000 and it's dripping water, that they don't go, oh, maybe I should cap that. 653 00:42:06,000 --> 00:42:08,000 Hey, look! 654 00:42:08,000 --> 00:42:11,000 There's a hole in the roof! 655 00:42:11,000 --> 00:42:13,000 I can call that. 656 00:42:13,000 --> 00:42:15,000 Can I wrap this up yet? 657 00:42:15,000 --> 00:42:17,000 Myth confirmed. 658 00:42:23,000 --> 00:42:27,000 So Grant, you're not going to keep those skin tight rocker jeans, can I have them? 659 00:42:27,000 --> 00:42:31,000 Yeah, you can have them, because I'll be returning to my regular shop jeans. 660 00:42:31,000 --> 00:42:32,000 Thank you very much. 661 00:42:32,000 --> 00:42:35,000 Do either of you want my jeans that were dragged through horse manure? 662 00:42:35,000 --> 00:42:37,000 Absolutely not. 663 00:42:37,000 --> 00:42:41,000 But I would like a few more myths where I get to go shopping at vintage clothing stores. 664 00:42:41,000 --> 00:42:42,000 Hmm, alright. 665 00:42:42,000 --> 00:42:46,000 Well, if you have any ideas for myths that involve carry-going shopping, 666 00:42:46,000 --> 00:42:50,000 log on to discovery.com slash mythbusters and let us know.