1 00:00:00,000 --> 00:00:04,000 It may not look like it, but we're professionals. Do us a favor. 2 00:00:05,000 --> 00:00:07,000 Don't try this at home! Whoa! 3 00:00:08,000 --> 00:00:14,000 On this episode of MythBusters, the fans take command in mythian control. 4 00:00:15,000 --> 00:00:16,000 Oops. 5 00:00:16,000 --> 00:00:23,000 First up, it's the Heinemann versus Newton, as Adam and Jamie cause a cacophony of car carnage. 6 00:00:23,000 --> 00:00:28,000 One car into one wall at 50 miles an hour, 100 miles per hour crash. 7 00:00:28,000 --> 00:00:30,000 Bring on the head on collision. 8 00:00:31,000 --> 00:00:35,000 Testing Jamie's notion on Newton's third law of motion. 9 00:00:35,000 --> 00:00:38,000 So are you ready for some more wanton destruction? 10 00:00:38,000 --> 00:00:43,000 Meanwhile, Carrie, Grant and Tori are back in the school of hard knocks. 11 00:00:43,000 --> 00:00:46,000 As they retest, knock your socks off. 12 00:00:48,000 --> 00:00:49,000 Ow! 13 00:00:49,000 --> 00:00:51,000 Knock your socks, buster! 14 00:00:51,000 --> 00:00:55,000 And this time, they're cruising from maximum bruising. 15 00:00:59,000 --> 00:01:01,000 Who are the MythBusters? 16 00:01:01,000 --> 00:01:02,000 Adam Savage. 17 00:01:02,000 --> 00:01:03,000 That is science. 18 00:01:03,000 --> 00:01:05,000 And Jamie Heinemann. 19 00:01:05,000 --> 00:01:06,000 We're gonna have an adventure. 20 00:01:06,000 --> 00:01:10,000 Between them more than 30 years of special effects experience. 21 00:01:10,000 --> 00:01:12,000 Fun for the whole family. 22 00:01:13,000 --> 00:01:16,000 Joining them, Grant Imahara. 23 00:01:16,000 --> 00:01:17,000 Formidable projectile. 24 00:01:17,000 --> 00:01:18,000 Carrie Byron. 25 00:01:19,000 --> 00:01:20,000 Let's do it. 26 00:01:20,000 --> 00:01:21,000 And Tori Belachie. 27 00:01:21,000 --> 00:01:22,000 To the hype! 28 00:01:22,000 --> 00:01:27,000 They don't just tell the myths, they put them to the test. 29 00:01:28,000 --> 00:01:40,000 So what's up? 30 00:01:40,000 --> 00:01:43,000 What's up is that the fans are in control. 31 00:01:43,000 --> 00:01:46,000 It is effectively mythian control. 32 00:01:46,000 --> 00:01:47,000 So how does that work? 33 00:01:47,000 --> 00:01:49,000 Cast your mind back to compact, compact. 34 00:01:49,000 --> 00:01:53,000 Remember, we smashed two semis into each other at 50 miles per hour. 35 00:01:53,000 --> 00:01:58,000 Which you said on camera was equivalent to one of them hitting a wall at 100 miles an hour. 36 00:01:58,000 --> 00:02:00,000 And the fans went nuts. 37 00:02:00,000 --> 00:02:01,000 They are revolting. 38 00:02:01,000 --> 00:02:03,000 They rose up and they said, no! 39 00:02:03,000 --> 00:02:07,000 Two cars hitting each other at 50 miles an hour is not equivalent to one hitting a wall at 100 miles an hour. 40 00:02:07,000 --> 00:02:10,000 It's equivalent to one hitting a wall at 50 miles an hour. 41 00:02:10,000 --> 00:02:12,000 They say that you were wrong. 42 00:02:13,000 --> 00:02:14,000 Let's test it. 43 00:02:14,000 --> 00:02:15,000 That's what I thought. 44 00:02:15,000 --> 00:02:18,000 It was the episode that had it all. 45 00:02:18,000 --> 00:02:19,000 Crashings. 46 00:02:21,000 --> 00:02:22,000 Wow. 47 00:02:22,000 --> 00:02:23,000 Smashes. 48 00:02:24,000 --> 00:02:28,000 And according to fans, a subtle physics faux pas. 49 00:02:28,000 --> 00:02:32,000 Both trucks were traveling at about 50 miles an hour when the impact occurred. 50 00:02:32,000 --> 00:02:38,000 Now that's equivalent to a single impact going into a solid wall at 100 miles an hour. 51 00:02:38,000 --> 00:02:40,000 Stop right there. 52 00:02:40,000 --> 00:02:42,000 This innocent remark. 53 00:02:42,000 --> 00:02:48,000 Now that's equivalent to a single impact going into a solid wall at 100 miles an hour. 54 00:02:49,000 --> 00:02:51,000 Sparked a fan frenzy. 55 00:02:51,000 --> 00:02:57,000 They reckon that because of Newton's third law, every action has an equal and opposite reaction. 56 00:02:57,000 --> 00:03:07,000 The two cars crashing at 50 miles per hour is the same as one car crashing into a wall at just 50 miles per hour and not a hundred. 57 00:03:08,000 --> 00:03:12,000 But can this counterintuitive argument really be right? 58 00:03:14,000 --> 00:03:17,000 Well, if the fans are in control, how do they want us to do it? 59 00:03:17,000 --> 00:03:20,000 Obviously they want us to smash some full-sized cars into each other. 60 00:03:20,000 --> 00:03:25,000 But I think we may be able to illuminate some of the physics here with a scale experiment. 61 00:03:25,000 --> 00:03:27,000 Under more controlled circumstances. 62 00:03:27,000 --> 00:03:28,000 Exactly. 63 00:03:28,000 --> 00:03:30,000 And then we get to smash some full-sized cars. 64 00:03:30,000 --> 00:03:32,000 Yes, we do. 65 00:03:33,000 --> 00:03:38,000 But first up, Adam is rigging a rig that will replicate the crash in miniature. 66 00:03:38,000 --> 00:03:43,000 The part of the car will be played by two weights on a pendulum. 67 00:03:43,000 --> 00:03:45,000 It's going to be loud. 68 00:03:45,000 --> 00:03:46,000 And the wall... 69 00:03:46,000 --> 00:03:49,000 Bring in the immovable object! 70 00:03:49,000 --> 00:03:51,000 Bring in the immovable object! 71 00:03:51,000 --> 00:03:54,000 It's time for the immovable object. 72 00:03:54,000 --> 00:03:57,000 ...will be played by this hunk of steel. 73 00:03:57,000 --> 00:03:58,000 Allow me to demonstrate the rig here. 74 00:03:58,000 --> 00:03:59,000 This is our car. 75 00:03:59,000 --> 00:04:01,000 It's basically a swinging hammer. 76 00:04:01,000 --> 00:04:03,000 This is our wall. 77 00:04:03,000 --> 00:04:06,000 It's an immovable piece of 1200 pounds of steel. 78 00:04:06,000 --> 00:04:12,000 I will be swinging this car into the wall at speed x and speed 2x, 79 00:04:12,000 --> 00:04:14,000 which is basically double speed x. 80 00:04:14,000 --> 00:04:16,000 That's our 50-mile-per-hour hit. 81 00:04:16,000 --> 00:04:18,000 That's our 100-mile-per-hour hit. 82 00:04:18,000 --> 00:04:23,000 Our measurement will be done simply with a piece of clay that sits right behind the main hammer 83 00:04:23,000 --> 00:04:26,000 and between it and a secondary hammer. 84 00:04:26,000 --> 00:04:30,000 Obviously, when I swing this car into the wall, that clay will compress. 85 00:04:30,000 --> 00:04:35,000 And it will likely compress a different amount at speed x than at speed 2x. 86 00:04:35,000 --> 00:04:41,000 And this gives me a beautiful comparison point when I smack two cars into each other a little bit later. 87 00:04:41,000 --> 00:04:47,000 OK, so the swing from 1x will imitate a 50-mile-per-hour wall crash. 88 00:04:47,000 --> 00:04:54,000 And the 2x swing will double the speed to replicate a crash into a wall at 100 miles per hour. 89 00:04:54,000 --> 00:04:57,000 Car hitting a wall at speed 1x. 90 00:04:57,000 --> 00:05:01,000 In 3, 2, 1. 91 00:05:01,000 --> 00:05:04,000 Satisfying ding, isn't it? 92 00:05:04,000 --> 00:05:05,000 Yeah. 93 00:05:05,000 --> 00:05:10,000 Satisfying may be, but more importantly, their first data point. 94 00:05:10,000 --> 00:05:15,000 Post compression length, 1.5. 95 00:05:15,000 --> 00:05:24,000 For a comprehensive result, the guys get into the swing of things and repeat the test five more times. 96 00:05:24,000 --> 00:05:29,000 Next, it's time to double the speed to 2x for a full swing. 97 00:05:29,000 --> 00:05:32,000 Uncompress length, 2.6. 98 00:05:32,000 --> 00:05:38,000 Car hitting a wall at speed 2x in 3, 2, 1. 99 00:05:38,000 --> 00:05:42,000 Ha ha ha ha ha ha ha ha. 100 00:05:42,000 --> 00:05:43,000 I think that's more. 101 00:05:43,000 --> 00:05:45,000 I think that's a lot more. 102 00:05:45,000 --> 00:05:48,000 Yep, and the measurements hammer that home. 103 00:05:48,000 --> 00:05:54,000 0.777. It's a little bit less than twice as compressed as the speed 1x hit. 104 00:05:54,000 --> 00:05:56,000 That makes sense, doesn't it? 105 00:05:56,000 --> 00:05:57,000 It does. 106 00:05:57,000 --> 00:06:07,000 Almost double the compression, but for a larger sample size, they swing into action and repeat the 2x test five times. 107 00:06:07,000 --> 00:06:11,000 And now that their clay collection is complete, what's next? 108 00:06:11,000 --> 00:06:14,000 Well, we've got our metric of speed x and speed 2x. 109 00:06:14,000 --> 00:06:16,000 Now it's time to smack two cars into each other. 110 00:06:16,000 --> 00:06:21,000 So we're going to remove the wall and bring in a second car. 111 00:06:21,000 --> 00:06:24,000 Physicists and fans stand by. 112 00:06:24,000 --> 00:06:26,000 They're identical. Let's do it. 113 00:06:26,000 --> 00:06:29,000 Because this is the moment of truth. 114 00:06:29,000 --> 00:06:35,000 Now that's equivalent to a single impact going into a solid wall at 100 miles an hour. 115 00:06:35,000 --> 00:06:40,000 Will the clay clear up the controversy or will it be as clear as mud? 116 00:06:45,000 --> 00:06:50,000 Music 117 00:06:50,000 --> 00:06:54,000 Okay, mission control. What do the fans have for us? 118 00:06:54,000 --> 00:06:55,000 Gas. 119 00:06:55,000 --> 00:06:57,000 Knock your socks off. 120 00:06:57,000 --> 00:06:58,000 Yep. 121 00:06:58,000 --> 00:06:59,000 Man, we totally busted that one. 122 00:06:59,000 --> 00:07:06,000 Apparently not. According to the fans, you can knock someone's socks off if you have a hard enough punch. 123 00:07:06,000 --> 00:07:08,000 So apparently we messed it up. 124 00:07:08,000 --> 00:07:09,000 Really? 125 00:07:09,000 --> 00:07:10,000 What did they say we got wrong? 126 00:07:10,000 --> 00:07:12,000 Take your pick. 127 00:07:12,000 --> 00:07:14,000 You used the wrong punch. 128 00:07:14,000 --> 00:07:16,000 Your socks had too much elastic in it. 129 00:07:16,000 --> 00:07:18,000 Buster was not supporting his own weight. 130 00:07:18,000 --> 00:07:21,000 Well, looks like we've got to pull our socks up and give this one another go. 131 00:07:21,000 --> 00:07:22,000 Cool. 132 00:07:22,000 --> 00:07:24,000 Cool. 133 00:07:24,000 --> 00:07:25,000 Cool. 134 00:07:25,000 --> 00:07:31,000 The last time the team tested the myth that one punch could lift Buster out of his legwear, 135 00:07:31,000 --> 00:07:34,000 500 psi was really intense. 136 00:07:34,000 --> 00:07:37,000 Nothing they tried could knock his socks off. 137 00:07:37,000 --> 00:07:40,000 And the myth was down for the count. 138 00:07:40,000 --> 00:07:41,000 Or was it? 139 00:07:41,000 --> 00:07:43,000 Well, apparently not. 140 00:07:43,000 --> 00:07:47,000 The fans flooded our inbox telling us exactly what we got wrong. 141 00:07:47,000 --> 00:07:53,000 Now, armed with a list of mythical mistakes, the team is ready for a rematch. 142 00:07:53,000 --> 00:07:56,000 So, given the huge ban response, where do we start? 143 00:07:56,000 --> 00:07:59,000 Well, the most prevalent criticism is that we used the wrong sock. 144 00:07:59,000 --> 00:08:04,000 We used elasticized, long sport socks, the worst case scenario for the experiment. 145 00:08:04,000 --> 00:08:06,000 Meaning they were too difficult to pull off. 146 00:08:06,000 --> 00:08:07,000 Exactly. 147 00:08:07,000 --> 00:08:10,000 Alright, well why don't we start out with the best case scenario sock? 148 00:08:10,000 --> 00:08:13,000 The one that requires the least amount of effort to pull off. 149 00:08:13,000 --> 00:08:16,000 Once we find that, then we can unleash some heavyweight punches on it. 150 00:08:16,000 --> 00:08:22,000 Alright, well since we need to be meticulous about this, we should also test hairy leg versus hairless leg. 151 00:08:22,000 --> 00:08:25,000 So that way we get the best leg sock combination. 152 00:08:25,000 --> 00:08:27,000 Are you volunteering your bare legs? 153 00:08:27,000 --> 00:08:29,000 I don't wax my legs. 154 00:08:29,000 --> 00:08:30,000 Not yet, you don't. 155 00:08:30,000 --> 00:08:31,000 Oh, hey! 156 00:08:31,000 --> 00:08:33,000 Round one. 157 00:08:34,000 --> 00:08:36,000 Right, first into the ring is the sock. 158 00:08:36,000 --> 00:08:41,000 Add to measure just how much force it takes to pull a sock off a human foot. 159 00:08:41,000 --> 00:08:46,000 I hope this is the sock puller and not the knee dislocator. 160 00:08:46,000 --> 00:08:49,000 Grant has designed this sock stripper. 161 00:08:49,000 --> 00:08:53,000 Let me introduce you to the dual sock pulling and measurement machine. 162 00:08:53,000 --> 00:08:58,000 Here I have a giant pneumatic cylinder capable of generating over 2,400 pounds of force, 163 00:08:58,000 --> 00:09:02,000 which would be equivalent to say, hanging a car on your sock and letting it drop. 164 00:09:02,000 --> 00:09:06,000 Connected to the clevis is a bar with dual high-precision force meters. 165 00:09:06,000 --> 00:09:07,000 Now, why 2 meters? 166 00:09:07,000 --> 00:09:14,000 Because we want to compare side by side, simultaneously, the difference between a hairy leg and a waxed leg. 167 00:09:14,000 --> 00:09:19,000 And finally, here in the seat, we'll sit our test subject, Tori. 168 00:09:19,000 --> 00:09:22,000 Unfortunately for Tori, he is destined for the hot seat. 169 00:09:22,000 --> 00:09:26,000 So, Kari is wielding the spatula of doom. 170 00:09:26,000 --> 00:09:27,000 How's that feel? 171 00:09:27,000 --> 00:09:29,000 It actually feels kind of good. 172 00:09:29,000 --> 00:09:31,000 What's so bad about waxing? 173 00:09:31,000 --> 00:09:33,000 So, ready? One, two, three. 174 00:09:40,000 --> 00:09:47,000 With Tori's legs now covering both faces, smooth and hairy, it's time to select the sock. 175 00:09:47,000 --> 00:09:49,000 What's with all the socks? 176 00:09:49,000 --> 00:09:53,000 Well, for this test, we are going to leave no sock untested. 177 00:09:53,000 --> 00:09:54,000 Look at this. 178 00:09:54,000 --> 00:10:05,000 We have long socks, short socks, cotton socks, nylon, wool, silk, and finally, genuine 19th century boxing socks. 179 00:10:05,000 --> 00:10:10,000 We're going to pull all of these socks off of Tori's feet and find the socks of least resistance. 180 00:10:10,000 --> 00:10:13,000 Ew, Tori's feet disgusting. 181 00:10:13,000 --> 00:10:15,000 Shut up. 182 00:10:15,000 --> 00:10:19,000 Yep, the sock stripper is set, so the team starts at the top. 183 00:10:19,000 --> 00:10:24,000 Okay, this is sock number one, cotton, long socks, loose elastic. 184 00:10:24,000 --> 00:10:27,000 Three, two, one. 185 00:10:29,000 --> 00:10:35,000 Kari notes the numbers and then it's just apply, strip, and repeat. 186 00:10:35,000 --> 00:10:39,000 Good man. I need you to take off my socks. 187 00:10:39,000 --> 00:10:42,000 Long sock, acrylic, nylon. Push the button. 188 00:10:44,000 --> 00:10:45,000 Ow! 189 00:10:45,000 --> 00:10:47,000 Didn't even come off my foot. 190 00:10:47,000 --> 00:10:51,000 They both peaked out at 35.38. 191 00:10:51,000 --> 00:11:03,000 Tori gets his socks off over and over and over as the team tries socks of every material and length to leave no sock untested, just as you demand it. 192 00:11:03,000 --> 00:11:07,000 These ones are the lovely socks knit with love from a fan. 193 00:11:07,000 --> 00:11:08,000 All right. 194 00:11:10,000 --> 00:11:11,000 Woo, those look good. 195 00:11:11,000 --> 00:11:13,000 5.64 pounds. 196 00:11:13,000 --> 00:11:19,000 Finally, after testing over 50 types of socks, they've got the data they need. 197 00:11:19,000 --> 00:11:25,000 So here's something crazy. Out of our top four contenders, two of them were long socks and two of them were short socks. 198 00:11:25,000 --> 00:11:29,000 So it's looking like fabric is much more important than length. Who would have thunk? 199 00:11:29,000 --> 00:11:36,000 Now, what we also found was that leg hair was a fairly big factor in making it harder to pull the sock off. 200 00:11:36,000 --> 00:11:40,000 In most cases, the smoother leg had less resistance. 201 00:11:40,000 --> 00:11:50,000 But most importantly, the wool knit sock is the sock of least resistance, requiring only 5.6 pounds of force to rip it from a bare leg. 202 00:11:50,000 --> 00:11:59,000 So the combination of variables that makes for the best sock are smooth leg and non-elastic woven woolen sock. 203 00:11:59,000 --> 00:12:03,000 That's going to be your best sock for trying to knock your socks off. 204 00:12:03,000 --> 00:12:05,000 Coming up next. 205 00:12:05,000 --> 00:12:07,000 This is the moment of truth. 206 00:12:07,000 --> 00:12:09,000 Were the fans right? 207 00:12:16,000 --> 00:12:21,000 In Compact Compact, the fans detected a disturbance in the forest. 208 00:12:21,000 --> 00:12:24,000 The airbag went off. 209 00:12:24,000 --> 00:12:28,000 So now it's Mythbusters versus Sir Isaac Neu. 210 00:12:28,000 --> 00:12:31,000 But for whom does the bell toll? 211 00:12:32,000 --> 00:12:35,000 These two pieces of clay tell the tale. 212 00:12:35,000 --> 00:12:40,000 This is the clay compressed at speed 1x. This is the clay compressed at speed 2x. 213 00:12:40,000 --> 00:12:46,000 Now, if Jamie's right that two cars hitting each other at speed x is equivalent to one car hitting a wall at speed 2x, 214 00:12:46,000 --> 00:12:51,000 then this is what the clay is going to look like when we smash two cars into each other at speed x. 215 00:12:51,000 --> 00:12:55,000 If the myth is true, this is what the clay in those cars is going to look like. 216 00:12:55,000 --> 00:12:58,000 Which is it? I quite honestly have no idea. 217 00:12:58,000 --> 00:13:01,000 This is the moment of truth. Are you ready to go? 218 00:13:01,000 --> 00:13:03,000 What are you doing back there? 219 00:13:03,000 --> 00:13:08,000 I'm ready. I'm going to cut from top dead center so that the amount of force on both is the same. 220 00:13:08,000 --> 00:13:10,000 Okay. Here we go. 221 00:13:10,000 --> 00:13:14,000 Two cars smashing into each other at speed 1x. 222 00:13:14,000 --> 00:13:17,000 In three, two, one. 223 00:13:18,000 --> 00:13:21,000 The clay catastrophe goes under the hammer. 224 00:13:21,000 --> 00:13:27,000 And judging by first impressions, it looks like the fans may be onto something. 225 00:13:28,000 --> 00:13:34,000 Well, I'll tell you right now. The compression I can see from here does not look like no 2x speed hit. 226 00:13:34,000 --> 00:13:36,000 It looks like a 1x speed hit. 227 00:13:36,000 --> 00:13:39,000 It looks a lot closer to a 1x than a 2x, but let's do the measurements. 228 00:13:39,000 --> 00:13:45,000 1.54. 1.28. 229 00:13:45,000 --> 00:13:55,000 The results are in. The two car test clay is almost identical to the clay from the 1x tests and nothing like the 2x tests. 230 00:13:55,000 --> 00:14:02,000 With all the variants and all of our tests, one thing was really consistent was that the 2x speed hits looked a lot like this 231 00:14:02,000 --> 00:14:07,000 and the 1x speed hits look a lot like this. And our head on collision, it looks like this. 232 00:14:11,000 --> 00:14:13,000 So where are we with the story? 233 00:14:13,000 --> 00:14:19,000 Well, the hammers and clay seem to be saying that it's looking pretty good for the myth that two cars hitting each other at 50 miles an hour 234 00:14:19,000 --> 00:14:25,000 might actually be equivalent to one car hitting a wall at 50 miles an hour and not at 100 as you previously stated. 235 00:14:25,000 --> 00:14:27,000 What do you want to do next? 236 00:14:27,000 --> 00:14:30,000 Next, I want to smash some cars. 237 00:14:30,000 --> 00:14:32,000 Alright then. 238 00:14:32,000 --> 00:14:40,000 Yep, although the impressionable clay supports the fan theory, will that be true when they test the metal of actual automobiles 239 00:14:40,000 --> 00:14:43,000 at a very special location? 240 00:14:44,000 --> 00:14:49,000 It's a platform 120 feet tall just for dropping stuff. 241 00:14:49,000 --> 00:14:55,000 This is a motorized steel barrel just for strapping down a car and turning it upside down. 242 00:14:56,000 --> 00:15:01,000 I'm not sure what this one's for, but I'm pretty sure I could come up with something cool to do with it. 243 00:15:03,000 --> 00:15:09,000 Where am I? I'm in Arizona in the middle of 150 acres of pure awesome. 244 00:15:09,000 --> 00:15:12,000 This is pretty much what I would design as my ideal playground. 245 00:15:12,000 --> 00:15:19,000 It's a test facility designed to break things, smash things, make them fail, and analyze the aftermath. 246 00:15:19,000 --> 00:15:25,000 This is one of the test facilities owned by Exponent Systems, and today they're going to help us smash some cars. 247 00:15:28,000 --> 00:15:32,000 And first up to feel the crash force is this. 248 00:15:32,000 --> 00:15:34,000 So this is our car. 249 00:15:34,000 --> 00:15:39,000 This is our car. We're going to smash it at 50 miles an hour into a wall. 250 00:15:39,000 --> 00:15:41,000 Well, let's get started. 251 00:15:41,000 --> 00:15:44,000 Alright. How's all this going to go down? 252 00:15:44,000 --> 00:15:47,000 This is a 1280 foot long crash rail. 253 00:15:47,000 --> 00:15:54,000 It has a track embedded in it and a cable that pulls a car along that track towards the impact spot. 254 00:15:55,000 --> 00:16:03,000 These two V8 engines, which have about 800 horsepower between them, pull this cable which pulls the car up to the car. 255 00:16:04,000 --> 00:16:06,000 It's at a desired speed. 256 00:16:06,000 --> 00:16:14,000 When the car gets to about here, the cable is going to release it, so it's traveling only under its own momentum, right into this big steel thing. 257 00:16:14,000 --> 00:16:24,000 It's at this point that we'll have a complete picture of what happens to a car when it's going 50 miles an hour and comes to a dead stop by crashing into a wall. 258 00:16:24,000 --> 00:16:32,000 It's not just a picture they'll be getting. Jamie has also added some high-tech trickery to capture the force facts. 259 00:16:33,000 --> 00:16:34,000 There we go. 260 00:16:34,000 --> 00:16:44,000 Inside the car, underneath the back seat, is mounted a block of accelerometers that measure deceleration of the impact in three separate axes of movement. 261 00:16:44,000 --> 00:16:49,000 That information is sent back to a data logger that's mounted in the back of the car. 262 00:16:49,000 --> 00:16:53,000 It records all that information. It's kind of like a black box. 263 00:16:53,000 --> 00:17:01,000 This crash is basically a data point, one of two that we will obtain in order to correctly analyze our head-on collision. 264 00:17:01,000 --> 00:17:08,000 Careful viewers will note that in the full scale we're following the same experimental procedure as we did with our hammers and clay. 265 00:17:08,000 --> 00:17:10,000 We think it has a nice symmetry. 266 00:17:10,000 --> 00:17:12,000 Shall we log the pre-crash length? 267 00:17:12,000 --> 00:17:13,000 Sure. 268 00:17:14,000 --> 00:17:16,000 15 feet. 269 00:17:16,000 --> 00:17:17,000 All right then. 270 00:17:20,000 --> 00:17:22,000 All right, the cable's ready. Come on in. 271 00:17:22,000 --> 00:17:32,000 With the length logged and the black box engaged, the car is ready to meet its fate, slamming into a solid steel wall at 50 miles per hour. 272 00:17:33,000 --> 00:17:39,000 All right, this is one car into one wall at 50 miles an hour. Take it away. 273 00:17:39,000 --> 00:17:41,000 Okay Bob, we're ready for the lap. 274 00:17:41,000 --> 00:17:50,000 The V8 engines roar as they spin the cable, and the car gains speed till it's holding it precisely 50 miles per hour. 275 00:17:51,000 --> 00:17:56,000 And then plows headlong into a wall of steel. 276 00:18:05,000 --> 00:18:06,000 Oops. 277 00:18:09,000 --> 00:18:11,000 I hope they're in short. 278 00:18:14,000 --> 00:18:16,000 Yep, it's a car crash, I think. 279 00:18:16,000 --> 00:18:22,000 Yeah, I'd say what happened here is this car here hit this wall. There. 280 00:18:23,000 --> 00:18:33,000 It's a spectacular smash. The force of the impact crunched the front of the car like a car hitting a steel wall at 50 miles per hour. 281 00:18:34,000 --> 00:18:36,000 Leaving it three and a half feet shorter. 282 00:18:36,000 --> 00:18:38,000 11 feet seven inches. 283 00:18:38,000 --> 00:18:41,000 But of course that's not the only impact stat. 284 00:18:41,000 --> 00:18:44,000 What say we find out what the G-load was? 285 00:18:44,000 --> 00:18:48,000 These guys are downloading the data about the crash right now. 286 00:18:50,000 --> 00:18:52,000 Okay, here's the stats on that crash. 287 00:18:52,000 --> 00:19:01,000 This car hit that wall at 50.7 miles per hour and took an average of 58 G's in the longitudinal direction. 288 00:19:01,000 --> 00:19:08,000 I'm going to go out on a limb and say that when we smash a car into this wall at 100 miles an hour, the G-load is going to be significantly higher. 289 00:19:08,000 --> 00:19:15,000 Well, luckily for us, the only way to confirm that is more car carnage. 290 00:19:38,000 --> 00:19:48,000 The myth busters have the sock of least resistance, so now those slipped right off. 291 00:19:48,000 --> 00:19:52,000 So next they're finding buster, some real legs. 292 00:19:52,000 --> 00:19:55,000 Now last time we did this experiment, we used these feet. 293 00:19:55,000 --> 00:19:59,000 Now you felt like they didn't have the same kind of resistance that human skin would have. 294 00:19:59,000 --> 00:20:07,000 So I've casted up my foot and now I'm going to try different materials to see what kind of material is as close to human skin. 295 00:20:07,000 --> 00:20:16,000 Tori's used plastic, ballistics medium, foam and lamb skin leather to find something that simulates a skin-like surface. 296 00:20:16,000 --> 00:20:18,000 What is that? 297 00:20:18,000 --> 00:20:20,000 This feels like somebody uses lotion. 298 00:20:20,000 --> 00:20:22,000 Carrie likes the lamb skin. 299 00:20:22,000 --> 00:20:29,000 I really think this is going to be the winner because it really just feels the most like skin, which is probably because it is skin. 300 00:20:29,000 --> 00:20:36,000 And after a quick run of tug tests on the sock puller, it turns out her instincts were flawless. 301 00:20:36,000 --> 00:20:38,000 Yes, 6.25. 302 00:20:38,000 --> 00:20:40,000 This is the most like human skin. 303 00:20:40,000 --> 00:20:49,000 The leather leg, complete with articulated ankles, has an identical sock resistance to Tori's wax leg, making it perfect for testing. 304 00:20:49,000 --> 00:20:53,000 I'm working on my yoga. I think I'm getting pretty good. 305 00:20:57,000 --> 00:21:01,000 And now that buster has two left feet, he's cruising for a bruising. 306 00:21:01,000 --> 00:21:03,000 It looks like a bionic man. 307 00:21:03,000 --> 00:21:07,000 The team have a whole range of punches to throw. 308 00:21:07,000 --> 00:21:09,000 It's like assembling an old friend. 309 00:21:09,000 --> 00:21:14,000 But first, they're starting with a familiar enemy, Nitro Punch. 310 00:21:14,000 --> 00:21:19,000 Now I originally built this nitrogen cannon to fire a grappling hook from a moving car. 311 00:21:19,000 --> 00:21:23,000 The first time we tested it, it flew off the table like a rocket. 312 00:21:23,000 --> 00:21:26,000 The second time we tested it, it punched a hole in the wall. 313 00:21:26,000 --> 00:21:29,000 That is the power of the Nitrogen Cannon. 314 00:21:30,000 --> 00:21:36,000 But before Nitro is unleashed, Grant's devising a system to get the drop on Buster. 315 00:21:36,000 --> 00:21:39,000 So this, my friends, is the laser trigger. 316 00:21:39,000 --> 00:21:41,000 It's got a beam right here and a sensor up here. 317 00:21:41,000 --> 00:21:47,000 When I break the beam, it fires a solenoid that drops Buster on his own way. 318 00:21:52,000 --> 00:21:56,000 Buster's full weight will be on his feet each time he's clobbered. 319 00:21:56,000 --> 00:22:00,000 So seconds out, it's round one, the uppercut. 320 00:22:00,000 --> 00:22:02,000 We're about to knock you out. 321 00:22:02,000 --> 00:22:06,000 Last time we pulled out Nitro Punch and gave Buster a really good uppercut, 322 00:22:06,000 --> 00:22:10,000 we almost knocked his socks off and that was with a tight sport sock. 323 00:22:10,000 --> 00:22:12,000 Now we're using this woolen handknit sock. 324 00:22:12,000 --> 00:22:14,000 I think this might actually work. 325 00:22:14,000 --> 00:22:17,000 Well, there's only one way to find out. 326 00:22:17,000 --> 00:22:19,000 500 psi, we're good to go. 327 00:22:19,000 --> 00:22:20,000 All right. 328 00:22:20,000 --> 00:22:24,000 Okay, this is uppercuts with proper socks and legs. 329 00:22:24,000 --> 00:22:25,000 All right. 330 00:22:25,000 --> 00:22:26,000 Fight. 331 00:22:26,000 --> 00:22:27,000 All right. 332 00:22:27,000 --> 00:22:28,000 Here we go. 333 00:22:28,000 --> 00:22:31,000 In three, two, one. 334 00:22:32,000 --> 00:22:34,000 What happened? 335 00:22:34,000 --> 00:22:35,000 Wow. 336 00:22:35,000 --> 00:22:36,000 We knocked him out. 337 00:22:36,000 --> 00:22:38,000 I can't tell if his socks came off or not. 338 00:22:38,000 --> 00:22:45,000 That punch just landed a massive 6,000 Newton uppercut straight to Buster's chin. 339 00:22:45,000 --> 00:22:48,000 That's twice the force of a heavyweight boxer. 340 00:22:48,000 --> 00:22:53,000 We stone cold knocked him out, but his socks are still on. 341 00:22:53,000 --> 00:22:54,000 They're not coming off. 342 00:22:54,000 --> 00:22:58,000 No matter how much force is hitting him, the socks are staying on. 343 00:22:58,000 --> 00:23:01,000 It looks like this is not the punch. 344 00:23:02,000 --> 00:23:07,000 Despite all the fan-inspired changes, the uppercut didn't cut it. 345 00:23:07,000 --> 00:23:11,000 But there's more bare knuckle action to come. 346 00:23:11,000 --> 00:23:12,000 Fight. 347 00:23:13,000 --> 00:23:18,000 Coming up next on Myth Buster, find out what kind of force it takes to knock socks off. 348 00:23:24,000 --> 00:23:30,000 Doaking it out in the ring could be a dangerous business, but could a prize-fighting punch 349 00:23:30,000 --> 00:23:33,000 knock your socks clean off? 350 00:23:33,000 --> 00:23:35,000 So far, no. 351 00:23:35,000 --> 00:23:36,000 It didn't work before. 352 00:23:36,000 --> 00:23:38,000 It didn't work this time. 353 00:23:38,000 --> 00:23:41,000 But the Myth Busters aren't throwing in the towel yet. 354 00:23:41,000 --> 00:23:44,000 That's because the fans think we have two other kinds of punches to try. 355 00:23:44,000 --> 00:23:46,000 The right hook and the body blow. 356 00:23:46,000 --> 00:23:50,000 We'll be testing both of these punches with robots because they have superhuman strength. 357 00:23:50,000 --> 00:23:53,000 And if they can't knock the socks off, they'll never get punched off. 358 00:23:53,000 --> 00:23:56,000 But we're going to start out by getting hooked. 359 00:23:57,000 --> 00:24:02,000 In the sweet signs of bruising, a right hook packs a powerful punch. 360 00:24:02,000 --> 00:24:08,000 By pivoting as he swings, a boxer drives the force of the blow across his opponent's body. 361 00:24:08,000 --> 00:24:15,000 It's this transverse momentum that could focus the friction to force the feet from the socks. 362 00:24:16,000 --> 00:24:21,000 For round two of punching, it's Buster versus the right hook. 363 00:24:21,000 --> 00:24:28,000 So, gentle viewers, to address your very important concerns, I've built this incredible punching robot that simulates a right hook. 364 00:24:29,000 --> 00:24:34,000 And these are the hand-knit wool socks that had the least resistance, and they are over our human-like feet. 365 00:24:35,000 --> 00:24:38,000 And this is our quick release and laser trigger. 366 00:24:38,000 --> 00:24:43,000 So just before impact, it will release Buster, so he's standing on his own weight just as you requested. 367 00:24:43,000 --> 00:24:44,000 We're ready to go. 368 00:24:46,000 --> 00:24:50,000 Buster's Sideways 369 00:24:50,000 --> 00:24:51,000 Fight! 370 00:24:51,000 --> 00:24:54,000 Alright, here we go. In three, two, one. 371 00:24:56,000 --> 00:24:57,000 Wow. 372 00:24:57,000 --> 00:24:58,000 Wow. 373 00:24:58,000 --> 00:24:59,000 We knocked him over. 374 00:24:59,000 --> 00:25:02,000 But look, the socks are still on. 375 00:25:03,000 --> 00:25:08,000 One massive right hook to the head, and the force is enough to knock Buster's sideways. 376 00:25:08,000 --> 00:25:10,000 But not his socks. 377 00:25:11,000 --> 00:25:12,000 That punch was incredible. 378 00:25:12,000 --> 00:25:13,000 I mean, the power. Bang! 379 00:25:14,000 --> 00:25:16,000 And Buster actually did a somersault. 380 00:25:16,000 --> 00:25:19,000 However, did not knock his socks off. 381 00:25:19,000 --> 00:25:21,000 But Buster has one heck of a chin. 382 00:25:22,000 --> 00:25:24,000 Looks like he wants to go for another round. 383 00:25:25,000 --> 00:25:30,000 And for the last round, the team have the most powerful punch yet, the Body Blow. 384 00:25:32,000 --> 00:25:40,000 Now, our Body Blow machine is the most powerful one we have, and that clock didn't add 52,000 Newtons or 15 times your average boxer. 385 00:25:42,000 --> 00:25:47,000 That massive momentum will be delivered right into Buster's bread basket. 386 00:25:47,000 --> 00:25:50,000 This is Knock Your Socks Off, Straight Forward Body Blow. 387 00:25:50,000 --> 00:25:55,000 We have Knit Socks' Leather Legs and Buster on his own weight, 180 pounds. 388 00:25:55,000 --> 00:25:56,000 Fight! 389 00:25:56,000 --> 00:26:00,000 Alright, here we go. In three, two, one. 390 00:26:02,000 --> 00:26:03,000 Whoa. 391 00:26:03,000 --> 00:26:04,000 We knocked him out. 392 00:26:05,000 --> 00:26:07,000 But still, his socks remain on. 393 00:26:08,000 --> 00:26:19,000 Although there was some encouraging sock movement, even a punch 15 times that of a heavyweight boxer couldn't separate Buster's legs from his socks. 394 00:26:22,000 --> 00:26:25,000 So, the myth that you can punch someone out of their socks is busted. 395 00:26:25,000 --> 00:26:31,000 The uppercut couldn't do it, the right foot couldn't do it, even a super Body Blow could not do it. 396 00:26:31,000 --> 00:26:34,000 They all failed, even using the socks that were the easiest to come off. 397 00:26:34,000 --> 00:26:37,000 But don't worry, we're not going to give up, we're going to keep trying. 398 00:26:40,000 --> 00:26:41,000 Ugh. 399 00:26:41,000 --> 00:26:43,000 After the break, let's go twice as fast. 400 00:26:43,000 --> 00:26:46,000 Adam and Jamie drive another car up the wall. 401 00:26:49,000 --> 00:26:51,000 Please do not try what we do on this show at home. 402 00:26:51,000 --> 00:26:53,000 We're what you call experts. 403 00:26:53,000 --> 00:26:55,000 It's safer that way. 404 00:26:58,000 --> 00:27:01,000 Adam and Jamie are having a smashing time. 405 00:27:02,000 --> 00:27:05,000 All in the name of physics. 406 00:27:05,000 --> 00:27:07,000 How did we get here? 407 00:27:07,000 --> 00:27:10,000 Well, it all started when Jamie said this. 408 00:27:10,000 --> 00:27:13,000 Both trucks were traveling at about 50 miles an hour. 409 00:27:13,000 --> 00:27:18,000 That's equivalent to a single impact going into a solid wall at 100 miles an hour. 410 00:27:19,000 --> 00:27:23,000 That's pretty sound reasoning for my money, but no, the fans cried. 411 00:27:23,000 --> 00:27:28,000 Two cars hitting each other at 50 miles per hour do not equal one car hitting a wall at 100 miles per hour. 412 00:27:28,000 --> 00:27:33,000 Because their math is the same, they cancel each other out, and it's no different than one car hitting a wall at 50 miles an hour. 413 00:27:33,000 --> 00:27:38,000 I find this surprising and hard to wrap my head around, but our scale experiments seem to bear it out. 414 00:27:39,000 --> 00:27:41,000 But of course, we're not going to leave it there. 415 00:27:41,000 --> 00:27:45,000 This is what happens when you crash a car into a wall at 50 miles an hour. 416 00:27:45,000 --> 00:27:49,000 Next up, we're going to be crashing a car into a wall at 100 miles an hour. 417 00:27:49,000 --> 00:27:51,000 How bad will it be? 418 00:27:51,000 --> 00:27:54,000 We're just going to have to crash it to find out. 419 00:27:55,000 --> 00:27:59,000 So an identical car, well, except for the fact it's lemon yellow. 420 00:27:59,000 --> 00:28:01,000 That's good. Bring it straight in. 421 00:28:01,000 --> 00:28:03,000 Is hooked up to the track. 422 00:28:03,000 --> 00:28:04,000 All right. 423 00:28:05,000 --> 00:28:13,000 Now the 50 mile per hour impact clocked an impressive 58 Gs, but will doubling the speed double the damage to this car. 424 00:28:14,000 --> 00:28:15,000 It's good. 425 00:28:15,000 --> 00:28:18,000 I got to say that after watching that 50 mile an hour crash into the wall, 426 00:28:19,000 --> 00:28:25,000 I have a really hard time imagining that the 100 mile per hour crash is going to compress the car that much more. 427 00:28:25,000 --> 00:28:26,000 I don't know. 428 00:28:27,000 --> 00:28:30,000 So are you ready for some more wanton destruction? 429 00:28:30,000 --> 00:28:33,000 I am. Let's go twice as fast. 430 00:28:33,000 --> 00:28:34,000 All right. 431 00:28:36,000 --> 00:28:42,000 Wanton destruction it is as the mythbusters retire to a safe distance and the countdown begins. 432 00:28:43,000 --> 00:28:45,000 You ready to make this happen? 433 00:28:45,000 --> 00:28:48,000 I can't wait. I haven't seen a 100 mile an hour crash before. 434 00:28:48,000 --> 00:28:52,000 No. All right. Commence with the 100 mile per hour crash. 435 00:28:53,000 --> 00:29:00,000 On Adam's command, the engines were into life, straining to get the car up to exactly 100 miles per hour. 436 00:29:03,000 --> 00:29:05,000 It hurdles down the track. 437 00:29:05,000 --> 00:29:06,000 It's going flat out. 438 00:29:08,000 --> 00:29:12,000 The cable uncouples and the car plows into its final destination. 439 00:29:16,000 --> 00:29:25,000 The guys are understandably speechless. 440 00:29:27,000 --> 00:29:34,000 That impact crushed the lemon car with such force, it should be in a glass with ice and a cocktail umbrella. 441 00:29:38,000 --> 00:29:42,000 It's in a very different state than it was at 50 miles per hour. 442 00:29:42,000 --> 00:29:44,000 Yeah. It's a little shorter. 443 00:29:44,000 --> 00:29:47,000 I mean, we got a clear difference between the two crashes. 444 00:29:47,000 --> 00:29:48,000 Uh-huh. 445 00:29:49,000 --> 00:29:52,000 I can't wait to see what the data set says about the G-Load. 446 00:29:52,000 --> 00:29:54,000 If the data is still intact. 447 00:29:54,000 --> 00:29:56,000 If anything's still intact. 448 00:29:58,000 --> 00:30:02,000 Well, thanks to its position in the trunk, the flag box survived. 449 00:30:03,000 --> 00:30:05,000 But did we successfully retrieve anything? 450 00:30:05,000 --> 00:30:06,000 We've got good data. 451 00:30:06,000 --> 00:30:07,000 Really? 452 00:30:07,000 --> 00:30:12,000 Yeah, we've got a peak on the left side of 140 and a peak on the right side of 230. 453 00:30:12,000 --> 00:30:15,000 And we'd normally just average those to get a resultant there. 454 00:30:15,000 --> 00:30:17,000 So the midpoint's somewhere around 185? 455 00:30:17,000 --> 00:30:18,000 185. 456 00:30:18,000 --> 00:30:22,000 That's nice. That's significantly more than...what was the last one? 457 00:30:22,000 --> 00:30:23,000 58? 458 00:30:23,000 --> 00:30:24,000 58. 459 00:30:25,000 --> 00:30:26,000 Data! 460 00:30:27,000 --> 00:30:32,000 Three times the G's of the 50 mile per hour test is certainly significant. 461 00:30:32,000 --> 00:30:35,000 But that's not the only data set they're collecting. 462 00:30:37,000 --> 00:30:39,000 Before it was 15 feet. 463 00:30:42,000 --> 00:30:43,000 Now it's eight feet. 464 00:30:44,000 --> 00:30:49,000 So not only did the G-Load triple, the crash compacted almost half of the car. 465 00:30:49,000 --> 00:30:53,000 And remember, these two cars were identical. 466 00:30:55,000 --> 00:30:58,000 This may just seem like some gratuitous violence, 467 00:30:58,000 --> 00:31:02,000 but there's actually some really interesting science going on when you compare these two impacts. 468 00:31:03,000 --> 00:31:08,000 You would think that doubling the speed would give you twice the severity of the impact. 469 00:31:08,000 --> 00:31:11,000 But the physics says you're actually looking at more like... 470 00:31:11,000 --> 00:31:13,000 four times the severity of the impact. 471 00:31:14,000 --> 00:31:17,000 Our sensors are showing three times the G's, 472 00:31:17,000 --> 00:31:21,000 and our wreckage is showing about twice the damage. 473 00:31:21,000 --> 00:31:23,000 So what's going on here? 474 00:31:23,000 --> 00:31:29,000 Well, just like this can, the more I crush it, the more it resists crushing. 475 00:31:29,000 --> 00:31:31,000 There's some complex physics going on here, 476 00:31:31,000 --> 00:31:34,000 but you don't have to be a rocket scientist to understand it. 477 00:31:34,000 --> 00:31:36,000 The cars speak for themselves. 478 00:31:37,000 --> 00:31:39,000 They certainly do. 479 00:31:39,000 --> 00:31:45,000 And after two spectacular crashes, they have their benchmarks for car carnage. 480 00:31:46,000 --> 00:31:48,000 Well, we've got our data points. 481 00:31:48,000 --> 00:31:49,000 And they are lovely. 482 00:31:49,000 --> 00:31:52,000 I guess it's time to move on to the main event. 483 00:31:52,000 --> 00:31:53,000 Yep. 484 00:31:55,000 --> 00:31:56,000 Next up. 485 00:31:56,000 --> 00:31:58,000 Hold on to your socks, Buster! 486 00:31:58,000 --> 00:32:01,000 The Mythbusters think outside the boxing ring. 487 00:32:07,000 --> 00:32:09,000 Alright, look, we've tried everything. 488 00:32:09,000 --> 00:32:12,000 But even with superhuman strength and the best-case scenario sock, 489 00:32:12,000 --> 00:32:15,000 you still can't knock someone's socks off with a punch. 490 00:32:15,000 --> 00:32:20,000 No, but I think if we take this outside the boxing ring, we're going to see some results. 491 00:32:20,000 --> 00:32:23,000 Yeah, but last time we ramped this up, we used that frightening huge pendulum, 492 00:32:23,000 --> 00:32:24,000 and we still got nowhere. 493 00:32:26,000 --> 00:32:28,000 You know, that's another fan complaint. 494 00:32:28,000 --> 00:32:29,000 Here, listen. 495 00:32:29,000 --> 00:32:33,000 Your pendulum hit Buster at a lower speed than your punching rig. 496 00:32:33,000 --> 00:32:36,000 So this test was actually a ramp down rather than up. 497 00:32:36,000 --> 00:32:38,000 Yeah, but it did weigh a lot more. 498 00:32:38,000 --> 00:32:39,000 True. 499 00:32:39,000 --> 00:32:40,000 But you know what? 500 00:32:40,000 --> 00:32:45,000 To directly address that concern, why don't we increase both the mass and the speed? 501 00:32:45,000 --> 00:32:47,000 Okay, okay, how about this? 502 00:32:47,000 --> 00:32:48,000 Big steel girder. 503 00:32:48,000 --> 00:32:49,000 We weld it to a truck. 504 00:32:49,000 --> 00:32:52,000 We drive straight at Buster and bam! 505 00:32:52,000 --> 00:32:53,000 Ouch! 506 00:32:54,000 --> 00:32:58,000 For the final knockout round, they're heading to Alameda 507 00:32:58,000 --> 00:33:02,000 to definitively ramp this myth up once and for all. 508 00:33:04,000 --> 00:33:06,000 Brian, thank you so much for bringing your truck out. 509 00:33:06,000 --> 00:33:08,000 Now tell me what this thing can do. 510 00:33:08,000 --> 00:33:10,000 This truck is about 20,000 pounds plus loaded. 511 00:33:10,000 --> 00:33:11,000 It's turbo diesel. 512 00:33:11,000 --> 00:33:15,000 It can reach speeds of 80 miles an hour, and it's ready to take down Buster. 513 00:33:15,000 --> 00:33:17,000 I think this is the right truck. 514 00:33:19,000 --> 00:33:21,000 So you guys felt like the pendulum wasn't good enough. 515 00:33:21,000 --> 00:33:22,000 Well, this is what I have for you. 516 00:33:22,000 --> 00:33:28,000 What I have here is a 600-pound steel beam that I'm about to weld to this 13,000-pound truck. 517 00:33:28,000 --> 00:33:34,000 It's a simple build, one giant girder welded to one turbocharged truck. 518 00:33:34,000 --> 00:33:36,000 Alright, time to fight! 519 00:33:36,000 --> 00:33:38,000 And voila! 520 00:33:38,000 --> 00:33:42,000 Mass plus speed equals the behemoth of all battering ramps. 521 00:33:42,000 --> 00:33:47,000 While further down the range, Grant sets up his laser quick release 522 00:33:47,000 --> 00:33:51,000 and Carrie erects the structure for Buster's last stand. 523 00:33:51,000 --> 00:33:55,000 Now I've built a nice little balanced structure so that Buster can hang, 524 00:33:55,000 --> 00:33:59,000 and then I'm painting the entire thing yellow, maybe a little bit of pink, 525 00:33:59,000 --> 00:34:03,000 so that you can see it from far, far away because it's going to be a really long run-up. 526 00:34:03,000 --> 00:34:10,000 Once Carrie's hangman harness is complete, it's time to guide that girder right into Buster's reinforced guts. 527 00:34:10,000 --> 00:34:15,000 And they're going to start at a bone-crunching 40 miles per hour. 528 00:34:15,000 --> 00:34:24,000 We are about to hit Buster with 4,000 times the power as any boxer to see whether or not we can knock his socks out. 529 00:34:24,000 --> 00:34:29,000 I have a feeling we're going to knock his legs off before his socks come off, but let's see what happens. 530 00:34:29,000 --> 00:34:34,000 Remember, Buster is wearing the socks of least resistance on his human-like legs. 531 00:34:34,000 --> 00:34:37,000 He'll be standing at all 180 pounds of his own weight, 532 00:34:37,000 --> 00:34:43,000 and at impact he'll be hit with 4,000 times the force of a heavyweight boxing punch. 533 00:34:43,000 --> 00:34:46,000 Will that be enough for the socks to fly? 534 00:34:46,000 --> 00:34:48,000 Alright, getting into position! 535 00:34:48,000 --> 00:34:51,000 This is human-like surface width. 536 00:34:51,000 --> 00:34:55,000 The socks of least resistance, Buster on his own weight. 537 00:34:55,000 --> 00:34:57,000 Weight, going 40 miles per hour. 538 00:34:57,000 --> 00:35:01,000 Here we go in three, two, one, come on at ya! 539 00:35:02,000 --> 00:35:05,000 The truck speeds down the track at 40 miles per hour. 540 00:35:07,000 --> 00:35:09,000 Come on, do it! 541 00:35:09,000 --> 00:35:11,000 Triggers the quick release. 542 00:35:14,000 --> 00:35:15,000 Contact! 543 00:35:18,000 --> 00:35:20,000 Oh! 544 00:35:22,000 --> 00:35:23,000 Ow! 545 00:35:23,000 --> 00:35:26,000 It didn't knock his socks up, it did not just hand off! 546 00:35:27,000 --> 00:35:32,000 His hand flew off, but his socks are still on. 547 00:35:32,000 --> 00:35:34,000 We nailed him! 548 00:35:34,000 --> 00:35:40,000 The giant girder made contact, but it still wasn't a socks-off knock. 549 00:35:41,000 --> 00:35:43,000 However, there is good news. 550 00:35:44,000 --> 00:35:45,000 Whoa! 551 00:35:45,000 --> 00:35:47,000 It almost came off in the heel! 552 00:35:47,000 --> 00:35:50,000 It almost lifted him out of his sock! 553 00:35:50,000 --> 00:35:52,000 Well, you know what that means. 554 00:35:52,000 --> 00:35:53,000 We have to ramp it up. 555 00:35:53,000 --> 00:35:54,000 Yeah, you know what? 556 00:35:54,000 --> 00:35:56,000 This will go 65, but with all this weight, 557 00:35:56,000 --> 00:35:58,000 65 miles an hour might be enough to knock his socks off. 558 00:35:58,000 --> 00:35:59,000 Let's do it! 559 00:35:59,000 --> 00:36:00,000 Do it! 560 00:36:00,000 --> 00:36:04,000 We're going to hit him at 65 miles an hour with this steel bead. 561 00:36:04,000 --> 00:36:09,000 And it's going to be not two or three times more powerful than a human boxer. 562 00:36:09,000 --> 00:36:14,000 It's going to be 10,000 times more powerful than that boxer. 563 00:36:14,000 --> 00:36:18,000 Surely this has got to be the thing that knocks him out of his socks. 564 00:36:18,000 --> 00:36:20,000 Surely is right. 565 00:36:20,000 --> 00:36:27,000 If 10,000 times the force of a boxer can't knock the socks off buster, then it can't be done. 566 00:36:27,000 --> 00:36:29,000 I think we've really got a chance here. 567 00:36:29,000 --> 00:36:30,000 We got all the elements. 568 00:36:30,000 --> 00:36:32,000 All right, let's do it. 569 00:36:32,000 --> 00:36:37,000 All right, let's hit him at 65 miles an hour. 570 00:36:38,000 --> 00:36:39,000 Here we go! 571 00:36:39,000 --> 00:36:41,000 This is the main event! 572 00:36:41,000 --> 00:36:44,000 Let's see if we can knock both the socks off. 573 00:36:44,000 --> 00:36:48,000 The truck takes its position, then it's pedal to the metal. 574 00:36:48,000 --> 00:36:51,000 Fifty miles an hour! 575 00:36:51,000 --> 00:36:53,000 As it thunders down the track. 576 00:36:53,000 --> 00:36:55,000 Hold on to your socks buster. 577 00:36:55,000 --> 00:36:57,000 Sixty five miles an hour. 578 00:37:01,000 --> 00:37:04,000 Houston we have lift off. 579 00:37:04,000 --> 00:37:05,000 Woo hoo hoo! 580 00:37:05,000 --> 00:37:08,000 We knocked his socks off! 581 00:37:08,000 --> 00:37:09,000 Dude! 582 00:37:09,000 --> 00:37:11,000 Oh my God! 583 00:37:11,000 --> 00:37:13,000 We knocked his socks off! 584 00:37:13,000 --> 00:37:19,000 I turned around, all I could see was like an explosion and I saw two socks floating down to the ground. 585 00:37:19,000 --> 00:37:21,000 There you have it. 586 00:37:21,000 --> 00:37:28,000 One 30 million Newton Knock, one D-socked buster, and three ecstatic myth busters. 587 00:37:28,000 --> 00:37:31,000 But one question remains. 588 00:37:31,000 --> 00:37:33,000 My big question is what came off first? 589 00:37:33,000 --> 00:37:35,000 Socks or the feet? 590 00:37:35,000 --> 00:37:36,000 Oh! 591 00:37:36,000 --> 00:37:38,000 This whole face keeps it. 592 00:37:38,000 --> 00:37:39,000 Yes! 593 00:37:39,000 --> 00:37:40,000 The socks came off! 594 00:37:40,000 --> 00:37:41,000 Look at that! 595 00:37:41,000 --> 00:37:42,000 That's great! 596 00:37:42,000 --> 00:37:43,000 They didn't get dragged off. 597 00:37:43,000 --> 00:37:44,000 No! 598 00:37:44,000 --> 00:37:46,000 They knocked off! 599 00:37:46,000 --> 00:37:51,000 After the first time I heard this boxing myth, I thought to myself, who knows, maybe it's possible. 600 00:37:51,000 --> 00:37:56,000 But after we first tested it, I thought there is no way you can knock somebody's socks off. 601 00:37:56,000 --> 00:37:57,000 Until now. 602 00:37:57,000 --> 00:38:02,000 After seeing what I just saw, well we hit buster, knocked him out of his socks, it's possible. 603 00:38:02,000 --> 00:38:05,000 I mean a boxer couldn't do it, but we could. 604 00:38:05,000 --> 00:38:13,000 So after 20 some odd sock tests, multiple punches, does the phrase knock your socks off still hold true? 605 00:38:13,000 --> 00:38:17,000 Yes, as a matter of fact, you can knock someone's socks off. 606 00:38:17,000 --> 00:38:23,000 The caveat is that it's going to take 10,000 times what a boxer could do. 607 00:38:23,000 --> 00:38:28,000 So yes, you can use the phrase, but use it lightly. 608 00:38:28,000 --> 00:38:39,000 Up next, the myth busters head to head long into a head on collision. 609 00:38:45,000 --> 00:38:49,000 This car right here hit a wall at 50 miles an hour. 610 00:38:52,000 --> 00:38:54,000 This car hit a wall at 100 miles an hour. 611 00:38:54,000 --> 00:38:56,000 I think the difference is pretty clear. 612 00:38:56,000 --> 00:39:01,000 The question is, when we smack two cars together at 50 miles an hour, are they going to look like that? 613 00:39:01,000 --> 00:39:03,000 Or are they going to look like this? 614 00:39:03,000 --> 00:39:06,000 We're going to smash two more cars just to find out. 615 00:39:06,000 --> 00:39:10,000 It's the final act of Carmageddon. 616 00:39:10,000 --> 00:39:14,000 Two cars in a 50 mile per hour head on collisions. 617 00:39:15,000 --> 00:39:16,000 Here's how this breaks down. 618 00:39:16,000 --> 00:39:19,000 At this end of the track, the yellow car. 619 00:39:19,000 --> 00:39:22,000 And at this end sits the orange car. 620 00:39:22,000 --> 00:39:28,000 And here in the middle, these two cars will meet in a 50 mile per hour handshake of destruction 621 00:39:28,000 --> 00:39:33,000 that will hopefully answer all the questions we have about the crash forces involved. 622 00:39:33,000 --> 00:39:38,000 Adam's predicting those answers will give the thumbs up to Newton. 623 00:39:38,000 --> 00:39:42,000 This one has really been a brain bender, but I have a prediction for this final experiment. 624 00:39:42,000 --> 00:39:46,000 I think that when all of a sudden done, it's going to prove that Jamie was wrong 625 00:39:46,000 --> 00:39:47,000 and that the fans were actually right. 626 00:39:47,000 --> 00:39:51,000 That when these two cars hit at 50, they're going to look like the car that hit the wall at 50. 627 00:39:51,000 --> 00:39:53,000 Not the one that hit the wall at 100. 628 00:39:53,000 --> 00:39:55,000 And Jamie agrees. 629 00:39:55,000 --> 00:40:00,000 Based on our small scale testing, what we should see at the end of this head on collision 630 00:40:00,000 --> 00:40:05,000 should look pretty much like the 50 mile an hour crash against a wall. 631 00:40:08,000 --> 00:40:10,000 It's crunch time for a force impact. 632 00:40:10,000 --> 00:40:14,000 Will the full scale test prove the fans right? 633 00:40:14,000 --> 00:40:16,000 That's it. 634 00:40:18,000 --> 00:40:20,000 Well, I think it's time to do the final test. 635 00:40:20,000 --> 00:40:22,000 They're all set up. 636 00:40:22,000 --> 00:40:24,000 It would seem so. I'm going to call it. 637 00:40:24,000 --> 00:40:27,000 Bring on the head on collision. 638 00:40:29,000 --> 00:40:36,000 From each end of the 1280 foot track, the identical 1.5 ton cars take off. 639 00:40:39,000 --> 00:40:45,000 Both cars gain speed as they head headlong down the track towards their head on collision. 640 00:40:46,000 --> 00:40:50,000 Then as both cars reach 50 miles per hour, 641 00:40:50,000 --> 00:40:52,000 It's about to happen. 642 00:40:52,000 --> 00:40:54,000 the cables uncoupled. 643 00:41:02,000 --> 00:41:04,000 That was sick. 644 00:41:05,000 --> 00:41:07,000 What can you say? 645 00:41:08,000 --> 00:41:10,000 What can you say? 646 00:41:11,000 --> 00:41:16,000 That breathtaking finale is the final piece of their physics puzzle. 647 00:41:18,000 --> 00:41:24,000 And as the mythbusters survey the wreck of a two car 50 mile per hour pile up, 648 00:41:24,000 --> 00:41:27,000 they're playing spot the difference. 649 00:41:27,000 --> 00:41:30,000 There's a windshield between them. 650 00:41:30,000 --> 00:41:32,000 It's pretty evident, isn't it? 651 00:41:32,000 --> 00:41:34,000 It really is. 652 00:41:34,000 --> 00:41:37,000 It looks just like the 50 mile an hour against a wall crash. 653 00:41:37,000 --> 00:41:39,000 And nothing like the 100. 654 00:41:39,000 --> 00:41:41,000 Nope. 655 00:41:41,000 --> 00:41:43,000 Amazing. 656 00:41:46,000 --> 00:41:48,000 This tells me the whole story. 657 00:41:48,000 --> 00:41:51,000 I don't need to see the accelerometer data or anything. 658 00:41:51,000 --> 00:41:56,000 These two cars which hit each other at 50 miles an hour look exactly like the car 659 00:41:56,000 --> 00:41:58,000 which is back into the wall at 50 miles an hour. 660 00:41:58,000 --> 00:42:01,000 That tells me everything I need to know. 661 00:42:02,000 --> 00:42:08,000 While the figures are in, the orange car got 52 G's, the yellow car got 58 G's, 662 00:42:08,000 --> 00:42:15,000 which, give or take a few G's is the same as what we got against a wall at 50 miles an hour. 663 00:42:15,000 --> 00:42:17,000 G wins. 664 00:42:17,000 --> 00:42:19,000 And the damage data backs up those numbers. 665 00:42:19,000 --> 00:42:27,000 Both of the cars are virtually the same length as the 50 mile per hour wall test at 11.5 feet. 666 00:42:29,000 --> 00:42:33,000 And after a spectacular spree of automotive mayhem, 667 00:42:33,000 --> 00:42:39,000 there is irrefutable proof that those physicist fans had it right. 668 00:42:39,000 --> 00:42:46,000 Newton's third law, every action has an equal and opposite reaction holds true. 669 00:42:46,000 --> 00:42:50,000 Although the two car crash at 50 miles per hour doubles the speed, 670 00:42:50,000 --> 00:42:54,000 the energy of the crash is transferred to twice the mass, 671 00:42:54,000 --> 00:43:01,000 having it resulting in a crash that looks like just one car into a wall at 50 miles per hour. 672 00:43:01,000 --> 00:43:09,000 I made a statement that two cars hitting each other at 50 miles an hour was the same as one car hitting a solid wall at 100. 673 00:43:09,000 --> 00:43:14,000 That was a mistake, but you know what? I'm okay with it. That's how you learn stuff. 674 00:43:15,000 --> 00:43:17,000 I love smashing stuff for science. 675 00:43:17,000 --> 00:43:20,000 One way or another, it's all just shrapnel.