1 00:00:00,000 --> 00:00:02,000 Give us a break. 2 00:00:02,000 --> 00:00:04,000 Don't try what you're about to see at home. 3 00:00:30,000 --> 00:00:32,000 I'm sorry. 4 00:00:32,000 --> 00:00:34,000 Tackle a tall tale of TNT. 5 00:00:34,000 --> 00:00:36,000 And surfing. 6 00:00:36,000 --> 00:00:38,000 Can you ride away 7 00:00:38,000 --> 00:00:40,000 created with explosives? 8 00:00:40,000 --> 00:00:42,000 Who are the mythbusters? 9 00:00:42,000 --> 00:00:44,000 Yee-haw! 10 00:00:44,000 --> 00:00:46,000 Adam Savage 11 00:00:46,000 --> 00:00:48,000 Time for science! 12 00:00:48,000 --> 00:00:50,000 And Jamie Heineman 13 00:00:50,000 --> 00:00:52,000 Is that beautiful or what? 14 00:00:52,000 --> 00:00:54,000 Between the more than 30 years 15 00:00:54,000 --> 00:00:56,000 of special effects experience 16 00:00:56,000 --> 00:00:58,000 it's a great experience. 17 00:00:58,000 --> 00:01:00,000 It bleeds! 18 00:01:00,000 --> 00:01:02,000 Let's go! 19 00:01:02,000 --> 00:01:04,000 Joining them, Grant Imahara 20 00:01:04,000 --> 00:01:06,000 Don't give up on me now! 21 00:01:06,000 --> 00:01:08,000 Tori Belichi 22 00:01:08,000 --> 00:01:10,000 And that's how we like it. 23 00:01:10,000 --> 00:01:12,000 And Carrie Byron 24 00:01:12,000 --> 00:01:14,000 They don't just tell the myths 25 00:01:14,000 --> 00:01:16,000 they put them to the test. 26 00:01:28,000 --> 00:01:30,000 First up, it's Up Up and Away 27 00:01:30,000 --> 00:01:32,000 with Adam and Jamie. 28 00:01:32,000 --> 00:01:34,000 Ta-da! 29 00:01:34,000 --> 00:01:36,000 Something tells me balloon myth? 30 00:01:36,000 --> 00:01:38,000 Absolutely right. 31 00:01:38,000 --> 00:01:40,000 It's not only balloon myth 32 00:01:40,000 --> 00:01:42,000 it's actually also an idiom. 33 00:01:42,000 --> 00:01:44,000 Have you ever heard the expression 34 00:01:44,000 --> 00:01:46,000 going down like a lead balloon? 35 00:01:46,000 --> 00:01:48,000 You mean like that'll never happen? 36 00:01:48,000 --> 00:01:50,000 Yeah, something impossible. 37 00:01:50,000 --> 00:01:52,000 The myth is that it is totally impossible 38 00:01:52,000 --> 00:01:54,000 to make a balloon like this one 39 00:01:54,000 --> 00:01:56,000 out of lead. 40 00:01:56,000 --> 00:01:58,000 So you're going to build one? 41 00:01:58,000 --> 00:02:00,000 Well that's the only way to test it is to try. 42 00:02:00,000 --> 00:02:02,000 That's what we do. 43 00:02:02,000 --> 00:02:04,000 To go over like a lead balloon 44 00:02:04,000 --> 00:02:06,000 means you've fallen short, 45 00:02:06,000 --> 00:02:08,000 gone bust, 46 00:02:08,000 --> 00:02:10,000 or just plain fail to get off the ground. 47 00:02:10,000 --> 00:02:12,000 Which means an airborne lead balloon 48 00:02:12,000 --> 00:02:14,000 is an oxymoron. 49 00:02:14,000 --> 00:02:16,000 It'll never happen. 50 00:02:16,000 --> 00:02:18,000 Because lead's defining characteristic 51 00:02:18,000 --> 00:02:20,000 is it's heavy. 52 00:02:20,000 --> 00:02:22,000 And heavy just doesn't fly. 53 00:02:22,000 --> 00:02:24,000 Or doesn't. 54 00:02:24,000 --> 00:02:26,000 You know the envelope of this thing weighs 55 00:02:26,000 --> 00:02:28,000 almost 500 pounds? 56 00:02:28,000 --> 00:02:30,000 Yeah and it's huge. 57 00:02:30,000 --> 00:02:32,000 Something tells me we're not going to make 58 00:02:32,000 --> 00:02:34,000 a lead balloon quite that big. 59 00:02:34,000 --> 00:02:36,000 Well I don't think the goal is to make a balloon 60 00:02:36,000 --> 00:02:38,000 that lifts us out of lead. 61 00:02:38,000 --> 00:02:40,000 Let's say it's just big enough to lift itself 62 00:02:40,000 --> 00:02:42,000 and maybe a little basket. 63 00:02:42,000 --> 00:02:44,000 I'll settle for that. 64 00:02:44,000 --> 00:02:46,000 So will I. 65 00:02:46,000 --> 00:02:48,000 So if Adam and Jamie with all their build skills 66 00:02:48,000 --> 00:02:50,000 and engineering nows 67 00:02:50,000 --> 00:02:52,000 can get a lead balloon to fly 68 00:02:52,000 --> 00:02:54,000 then they just can't resist. 69 00:02:54,000 --> 00:02:56,000 I think the biggest problem we're going to have 70 00:02:56,000 --> 00:02:58,000 making a lead balloon is around the material itself. 71 00:02:58,000 --> 00:03:00,000 Because I mean 72 00:03:00,000 --> 00:03:02,000 this balloon is made of fabric that's extremely 73 00:03:02,000 --> 00:03:04,000 light and very strong. 74 00:03:04,000 --> 00:03:06,000 We're going to be building a balloon that's 75 00:03:06,000 --> 00:03:08,000 very heavy and very weak. 76 00:03:08,000 --> 00:03:10,000 So... 77 00:03:10,000 --> 00:03:12,000 not so easy. 78 00:03:12,000 --> 00:03:14,000 After an uplifting perspective on the myth 79 00:03:14,000 --> 00:03:16,000 it's back to worth. 80 00:03:16,000 --> 00:03:18,000 And specifically M5 81 00:03:18,000 --> 00:03:20,000 to get things rolling. 82 00:03:20,000 --> 00:03:22,000 Before they source the all important lead 83 00:03:22,000 --> 00:03:24,000 they decide to split up and see 84 00:03:24,000 --> 00:03:26,000 what they can learn with a stronger 85 00:03:26,000 --> 00:03:28,000 and lighter material aluminum. 86 00:03:28,000 --> 00:03:30,000 My thoughts for doing a small scale build 87 00:03:30,000 --> 00:03:32,000 in aluminum are that I want this thing to look 88 00:03:32,000 --> 00:03:34,000 a balloon like. 89 00:03:34,000 --> 00:03:36,000 I could just make a tube 90 00:03:36,000 --> 00:03:38,000 I could make a lot of different simple shapes 91 00:03:38,000 --> 00:03:40,000 but I really wanted to be as round 92 00:03:40,000 --> 00:03:42,000 as possible. 93 00:03:42,000 --> 00:03:44,000 So I'm actually going to go for an icosahedron. 94 00:03:44,000 --> 00:03:46,000 That's a 20 sided 95 00:03:46,000 --> 00:03:48,000 regular solid 96 00:03:48,000 --> 00:03:50,000 and each side is an equilateral triangle. 97 00:03:50,000 --> 00:03:52,000 So Adam is basing his 98 00:03:52,000 --> 00:03:54,000 design on one of the five platonic solids. 99 00:03:54,000 --> 00:03:56,000 The five... 100 00:03:56,000 --> 00:03:58,000 what's it? 101 00:03:58,000 --> 00:04:00,000 The platonic and archa-median solids are 102 00:04:00,000 --> 00:04:02,000 polygons of regular shapes. 103 00:04:02,000 --> 00:04:04,000 Like a cube is one of the regular solids 104 00:04:04,000 --> 00:04:06,000 because it's six squares. 105 00:04:06,000 --> 00:04:08,000 Typically while Adam 106 00:04:08,000 --> 00:04:10,000 approaches the problem with a little magic 107 00:04:10,000 --> 00:04:12,000 math and a silly hat 108 00:04:12,000 --> 00:04:14,000 Jamie keeps things simple. 109 00:04:14,000 --> 00:04:16,000 I figure if 110 00:04:16,000 --> 00:04:18,000 the simplest possible way of building a balloon 111 00:04:18,000 --> 00:04:20,000 is just to put two sheets together 112 00:04:20,000 --> 00:04:22,000 and seal along the edges 113 00:04:22,000 --> 00:04:24,000 why don't I put two sheets together 114 00:04:24,000 --> 00:04:26,000 the same way but 115 00:04:26,000 --> 00:04:28,000 start by draping them across a hemisphere 116 00:04:28,000 --> 00:04:30,000 a rigid male mole. 117 00:04:30,000 --> 00:04:32,000 With both designs complete 118 00:04:32,000 --> 00:04:34,000 the guys are ready for the float off. 119 00:04:34,000 --> 00:04:36,000 Jamie, do you mind if I go first? 120 00:04:36,000 --> 00:04:38,000 I'm going to fill my balloon first. Is that okay with you? 121 00:04:38,000 --> 00:04:40,000 Is that okay with you? I'd like to fill my balloon first if that's alright with you. 122 00:04:40,000 --> 00:04:42,000 Okay. 123 00:04:46,000 --> 00:04:48,000 Hey! 124 00:04:48,000 --> 00:04:50,000 That's almost balloon-like. 125 00:04:50,000 --> 00:04:52,000 Very nice. 126 00:04:52,000 --> 00:04:54,000 It's an approximately spherical shape. 127 00:04:54,000 --> 00:04:56,000 It's icosahedral. 128 00:04:56,000 --> 00:04:58,000 Icosahedral. 129 00:04:58,000 --> 00:05:00,000 The question now is how will Jamie's 130 00:05:00,000 --> 00:05:02,000 super simple two-piece compare? 131 00:05:02,000 --> 00:05:04,000 After a blast of fast forward 132 00:05:04,000 --> 00:05:06,000 it's inflated and they're elated. 133 00:05:06,000 --> 00:05:08,000 Ha ha ha ha ha ha ha ha ha ha! 134 00:05:08,000 --> 00:05:10,000 It's an actual 135 00:05:10,000 --> 00:05:12,000 foil balloon! 136 00:05:12,000 --> 00:05:14,000 So the guys have two different 137 00:05:14,000 --> 00:05:16,000 but successful designs 138 00:05:16,000 --> 00:05:18,000 but they're made of aluminum foil 139 00:05:18,000 --> 00:05:20,000 which is six times lighter 140 00:05:20,000 --> 00:05:22,000 and much stronger than lead. 141 00:05:22,000 --> 00:05:24,000 Fly! 142 00:05:24,000 --> 00:05:26,000 Ha ha ha ha ha ha ha ha ha!! 143 00:05:34,000 --> 00:05:36,000 Next carry grant and Tory 144 00:05:36,000 --> 00:05:38,000 mix science with the art 145 00:05:38,000 --> 00:05:40,000 of surfing and get 146 00:05:40,000 --> 00:05:42,000 an explosive result. 147 00:05:42,000 --> 00:05:42,840 Right here. 148 00:05:42,840 --> 00:05:44,240 How much of lo-ha do you have in that shaka? 149 00:05:44,240 --> 00:05:45,440 So much, it's sick. 150 00:05:45,440 --> 00:05:46,980 What are you guys talking about? 151 00:05:46,980 --> 00:05:49,760 There's this viral video making its way around the internet 152 00:05:49,760 --> 00:05:52,440 where some renegade surfers are landlocked in a city 153 00:05:52,440 --> 00:05:53,800 but they wanna surf. 154 00:05:53,800 --> 00:05:55,460 Yeah, and then they find this canal. 155 00:05:55,460 --> 00:05:56,840 They throw in a bunch of dynamite, 156 00:05:56,840 --> 00:06:00,200 it explodes and creates a wave that one of the surfers rides. 157 00:06:00,200 --> 00:06:01,560 There's no way that could work. 158 00:06:01,560 --> 00:06:04,360 And even if it did, you'd probably be dead, right? 159 00:06:04,360 --> 00:06:06,240 Well, that's what we get to find out. 160 00:06:06,240 --> 00:06:07,080 High five. 161 00:06:07,080 --> 00:06:07,920 Yeah. 162 00:06:07,920 --> 00:06:08,760 Ah! 163 00:06:09,760 --> 00:06:12,840 In this viral video, a team of surfing gorillas 164 00:06:12,840 --> 00:06:15,280 are desperate to catch a wave. 165 00:06:15,280 --> 00:06:16,280 Their solution? 166 00:06:18,400 --> 00:06:21,920 Well, they hold their very own TNT party. 167 00:06:21,920 --> 00:06:24,520 And surf's up, dude. 168 00:06:24,520 --> 00:06:27,080 But were these guys really crazy enough 169 00:06:27,080 --> 00:06:28,720 to surf with dynamite, 170 00:06:28,720 --> 00:06:31,840 or is this just a cutting-edge commercial? 171 00:06:31,840 --> 00:06:33,920 Okay, so how are we gonna test this? 172 00:06:33,920 --> 00:06:36,600 Well, I think first we need some sort of proof of concept 173 00:06:36,640 --> 00:06:40,040 because I don't even know if explosives can set off a wave. 174 00:06:40,040 --> 00:06:42,240 I mean, in the movies sometimes you see a big splash, 175 00:06:42,240 --> 00:06:44,240 but not necessarily a wave. 176 00:06:44,240 --> 00:06:46,680 Well, that raises another issue, which is the depth. 177 00:06:46,680 --> 00:06:48,520 Does it need to be close to the surface 178 00:06:48,520 --> 00:06:50,200 or down further to create a wave? 179 00:06:50,200 --> 00:06:51,320 All right, well, why don't we test that 180 00:06:51,320 --> 00:06:52,760 by building a big water tank? 181 00:06:52,760 --> 00:06:54,440 We'll set off some explosions in it 182 00:06:54,440 --> 00:06:56,160 and see if we even create a wave. 183 00:06:56,160 --> 00:06:59,040 If we do, then we'll set the explosions at different depths 184 00:06:59,040 --> 00:07:01,760 and see if that has an effect on the size of the wave. 185 00:07:01,760 --> 00:07:02,600 Excellent. 186 00:07:02,600 --> 00:07:05,720 So Tori begins tackling this explosive fable 187 00:07:05,720 --> 00:07:07,960 by building a water tank in the backyard. 188 00:07:07,960 --> 00:07:10,120 All right, let's fill it up with water. 189 00:07:10,120 --> 00:07:12,920 High explosives can't be used in the parking lot, 190 00:07:12,920 --> 00:07:16,120 so Tori turns to an old myth-buster favorite. 191 00:07:16,120 --> 00:07:17,960 Cue dramatic music. 192 00:07:17,960 --> 00:07:20,560 The dry ice soda bottle bomb. 193 00:07:20,560 --> 00:07:23,400 Oh, wow! 194 00:07:23,400 --> 00:07:26,080 And here's Tori with the Big Bang Theory. 195 00:07:26,080 --> 00:07:29,120 All right, this is how you make a dry ice bursty bottle. 196 00:07:29,120 --> 00:07:31,960 You take a two-liter bottle of soda, empty it out, 197 00:07:31,960 --> 00:07:33,880 fill it up three quarters away with water, 198 00:07:33,880 --> 00:07:37,400 dump in a bunch of dry ice, put the cap back on, 199 00:07:37,400 --> 00:07:39,240 and as the dry ice is gassing off, 200 00:07:39,240 --> 00:07:42,240 the CO2 gases are building up pressure inside the bottle 201 00:07:42,240 --> 00:07:44,760 and eventually the bottle will rupture, 202 00:07:44,760 --> 00:07:47,320 giving you the dry ice bursty bottle. 203 00:07:49,280 --> 00:07:52,200 Okay, so we know that this experiment isn't to scale, 204 00:07:52,200 --> 00:07:55,040 but what we're after is what happens to the energy 205 00:07:55,040 --> 00:07:57,600 of an explosion when it's in water. 206 00:07:57,600 --> 00:08:01,600 Does it disturb the surface enough to be considered a wave? 207 00:08:01,600 --> 00:08:04,840 Or does it all just simply go straight up into the air? 208 00:08:04,840 --> 00:08:09,760 To find out, the team start with the least likely candidate 209 00:08:09,760 --> 00:08:13,720 for a surfable wave, a bottle bomb at the bottom of the tank. 210 00:08:13,720 --> 00:08:14,800 Look at the waves. 211 00:08:14,800 --> 00:08:16,400 We're getting some swell. 212 00:08:16,400 --> 00:08:19,120 The first test was with the bottle 213 00:08:19,120 --> 00:08:21,520 almost to the bottom of the pool. 214 00:08:21,520 --> 00:08:26,000 That's the worst case scenario in terms of creating 215 00:08:26,000 --> 00:08:28,240 some movement at the surface, 216 00:08:28,240 --> 00:08:30,680 because it's got to, the explosion's gotta push 217 00:08:30,720 --> 00:08:32,080 all the water above it. 218 00:08:32,080 --> 00:08:34,520 Next, it's a mid-depth detonation. 219 00:08:35,800 --> 00:08:37,200 Woo-hoo! 220 00:08:37,200 --> 00:08:38,880 That was a much bigger wave. 221 00:08:38,880 --> 00:08:41,280 It was a bigger wave, definitely. 222 00:08:41,280 --> 00:08:42,280 And finally, 223 00:08:45,320 --> 00:08:47,560 a bottle bomb at the surface. 224 00:08:47,560 --> 00:08:50,160 It definitely made much smaller, ripply waves. 225 00:08:50,160 --> 00:08:52,440 So the guys have their proof of concept, 226 00:08:52,440 --> 00:08:54,520 and explosion will make waves, 227 00:08:54,520 --> 00:08:59,200 and depth is a factor in the size and quality of those waves. 228 00:08:59,200 --> 00:09:01,440 And you could say Tori's excited. 229 00:09:01,440 --> 00:09:02,440 Yoo-hoo! 230 00:09:03,440 --> 00:09:05,320 Have you lost your damn mind? 231 00:09:05,320 --> 00:09:06,320 Woo-hoo! 232 00:09:08,080 --> 00:09:10,560 So in theory, this might be able to work. 233 00:09:10,560 --> 00:09:13,920 Yeah, but just to clarify, that was not a small scale, 234 00:09:13,920 --> 00:09:15,360 just a proof of concept. 235 00:09:15,360 --> 00:09:17,960 Yeah, but we did show that an explosion will cause a wave. 236 00:09:17,960 --> 00:09:21,800 Yeah, but doesn't a wave have to break before you can ride it? 237 00:09:21,800 --> 00:09:24,600 I'm not really sure, so I think we should go 238 00:09:24,600 --> 00:09:27,920 and talk to a surfing expert, and we could learn how to surf. 239 00:09:27,920 --> 00:09:30,680 Yeah, because if we make a surfable wave, I want to ride it. 240 00:09:30,680 --> 00:09:32,080 Cavalbunga! 241 00:09:32,080 --> 00:09:33,480 Let's rip it! 242 00:09:34,720 --> 00:09:35,720 Up! 243 00:09:37,960 --> 00:09:38,960 Cavalbunga! 244 00:09:43,840 --> 00:09:46,840 Life's a beach when you're a myth buster. 245 00:09:46,840 --> 00:09:50,560 I mean, what if the job requires you to go surfing for work? 246 00:09:50,560 --> 00:09:52,960 And after meeting Heath, their instructor, 247 00:09:52,960 --> 00:09:56,640 we learned that surfing lingo is all geek to grant. 248 00:09:56,680 --> 00:10:01,000 I am ready to rip it and shred some stuff. 249 00:10:01,000 --> 00:10:02,280 They say that right? 250 00:10:02,280 --> 00:10:05,160 Joking aside, before surfing with dynamite, 251 00:10:05,160 --> 00:10:08,680 the team needs to know they can plain old surf. 252 00:10:08,680 --> 00:10:10,160 Oh, it's cold! 253 00:10:10,160 --> 00:10:12,760 Or, you know, even get into the water. 254 00:10:15,400 --> 00:10:18,640 We're at Cowles Beach in Santa Cruz, and this is perfect for us, 255 00:10:18,640 --> 00:10:20,760 because as you can see, the waves are tiny, 256 00:10:20,760 --> 00:10:24,160 and that's probably what we're going to get from an explosion in the water, 257 00:10:24,160 --> 00:10:25,160 our little waves. 258 00:10:25,160 --> 00:10:27,960 And not only that, it's perfect for learning how to surf. 259 00:10:37,200 --> 00:10:41,160 Hot air ballooning is the oldest successful flight technology. 260 00:10:41,160 --> 00:10:44,080 It dates back to 1763, 261 00:10:44,080 --> 00:10:47,560 when the French Mongolia brothers took to the air. 262 00:10:47,560 --> 00:10:52,440 A rich history of refined recreational flying followed, 263 00:10:52,560 --> 00:10:56,640 until heavy metal ballooning, myth buster style. 264 00:10:56,640 --> 00:11:01,840 Adam and Jamie are tackling the myth that it's impossible to make a lead balloon fly. 265 00:11:03,120 --> 00:11:06,120 But they began by brainstorming with aluminum. 266 00:11:07,320 --> 00:11:09,360 What do you think? I mean, they both worked. 267 00:11:09,360 --> 00:11:11,480 I think that we're on to something, 268 00:11:11,480 --> 00:11:14,720 but I don't think we can make any conclusions until we see the lead foil. 269 00:11:16,160 --> 00:11:16,960 You're right. 270 00:11:16,960 --> 00:11:19,520 So all they need is the lead. Simple, right? 271 00:11:19,520 --> 00:11:22,040 I didn't think the lead foil was going to be the hardest part of this myth, 272 00:11:22,120 --> 00:11:25,600 but it was a hassle to find a US supplier. 273 00:11:26,520 --> 00:11:29,000 Hello, Sparkin C, English. 274 00:11:29,000 --> 00:11:33,520 Luckily, Jamie turned up a German maker of lead foils called Epstein. 275 00:11:34,080 --> 00:11:39,040 What this may look like is a box full of rolls of foil that weighs about 30 pounds. 276 00:11:39,040 --> 00:11:41,240 In fact, this is our lead balloon. 277 00:11:42,480 --> 00:11:47,480 Look, it's beautiful, beautiful, but very, very fragile. 278 00:11:47,480 --> 00:11:49,400 The problem is this. 279 00:11:49,480 --> 00:11:53,080 It just kind of falls apart. 280 00:11:53,080 --> 00:11:56,560 It's like almost like wet toilet paper. 281 00:11:57,040 --> 00:11:59,280 There's not going to be any room for error. 282 00:11:59,280 --> 00:12:03,840 It has to be done just exactly so, or we're not going to fly. 283 00:12:04,920 --> 00:12:08,400 Now that we've got this foil, rather than go right to the biggest balloon 284 00:12:08,400 --> 00:12:11,440 we can make with it, we're going to try making an interim balloon. 285 00:12:11,800 --> 00:12:13,800 This is a scale test, if you will. 286 00:12:14,800 --> 00:12:18,800 The guys go for a super simplistic two sheet lead balloon. 287 00:12:18,800 --> 00:12:22,800 And one of the first things they learn is the static from the tape is a problem. 288 00:12:22,800 --> 00:12:25,800 But Adam's Tash Trick solves that. 289 00:12:25,800 --> 00:12:28,800 A little static off, you'll see it drags a little less. 290 00:12:28,800 --> 00:12:29,800 I know, very nice. 291 00:12:29,800 --> 00:12:30,800 Isn't that cool? 292 00:12:30,800 --> 00:12:32,800 There's women out there who are going, 293 00:12:32,800 --> 00:12:34,800 oh, I wish I was that piece of tape right now. 294 00:12:34,800 --> 00:12:35,800 You think? 295 00:12:35,800 --> 00:12:37,800 I'm sure of it. 296 00:12:37,800 --> 00:12:39,800 Raise your hand. 297 00:12:40,800 --> 00:12:41,800 Yeah, you. 298 00:12:41,800 --> 00:12:42,800 Give me a break. 299 00:12:42,800 --> 00:12:45,800 The producers of Mythbusters are not responsible for any marital issues 300 00:12:45,800 --> 00:12:47,800 resulting from raised arms. 301 00:12:49,800 --> 00:12:50,800 All right, go for it. 302 00:12:53,800 --> 00:12:54,800 It's going up. 303 00:12:55,800 --> 00:12:57,800 Who's done this before? 304 00:12:58,800 --> 00:12:59,800 Nobody! 305 00:12:59,800 --> 00:13:03,800 So far, this virgin voyage has been plain sailing. 306 00:13:03,800 --> 00:13:04,800 Dude! 307 00:13:05,800 --> 00:13:06,800 It's a lead balloon. 308 00:13:06,800 --> 00:13:09,800 A degree of care during construction. 309 00:13:09,800 --> 00:13:10,800 I found a tear. 310 00:13:10,800 --> 00:13:13,800 And a few running repairs to seal any small tears. 311 00:13:13,800 --> 00:13:16,800 And Adam thinks they have this myth sewn up. 312 00:13:16,800 --> 00:13:19,800 This is my idea of a perfect scale test. 313 00:13:19,800 --> 00:13:21,800 Several things are clear to me looking at this. 314 00:13:21,800 --> 00:13:25,800 One is we're going to have to go bigger in order to get real buoyancy. 315 00:13:25,800 --> 00:13:27,800 And we're going to go as big as we can. 316 00:13:27,800 --> 00:13:30,800 Two is while the material is not as delicate as I had feared, 317 00:13:30,800 --> 00:13:32,800 it's still really, really delicate. 318 00:13:32,800 --> 00:13:35,800 I mean, tears are forming with just the least provocation. 319 00:13:35,800 --> 00:13:38,800 So we're going to have to be very, very careful. 320 00:13:38,800 --> 00:13:40,800 You're going to ruin it, aren't you? 321 00:13:40,800 --> 00:13:43,800 The third thing is, I think we're only going to get one chance to get this right. 322 00:13:43,800 --> 00:13:46,800 Like, if big tears start to appear because of the weight of the material, 323 00:13:46,800 --> 00:13:50,800 it's going to be nearly impossible to repair them on the fly. 324 00:13:50,800 --> 00:13:54,800 So we're just going to have to figure out a way to build this and fill it 325 00:13:54,800 --> 00:13:58,800 in a way that involves the least amount of stress on the material. 326 00:13:58,800 --> 00:13:59,800 Three great points. 327 00:13:59,800 --> 00:14:03,800 But surely the main point is it's not yet airborne. 328 00:14:03,800 --> 00:14:06,800 And as Jamie explains, that's because it's not big enough yet. 329 00:14:06,800 --> 00:14:09,800 This balloon has too much lead and not enough helium. 330 00:14:09,800 --> 00:14:14,800 So we need to go larger because the larger the balloon becomes, 331 00:14:14,800 --> 00:14:17,800 the greater the ratio of helium to lead. 332 00:14:17,800 --> 00:14:22,800 It's sort of a funny thing with physics and geometry, but that's the way it works. 333 00:14:22,800 --> 00:14:25,800 Yep, the larger the solid, the greater the volume. 334 00:14:25,800 --> 00:14:29,800 That's the helium compared to the surface area, which is the lead foil. 335 00:14:29,800 --> 00:14:32,800 So the bigger the balloon, the more buoyancy it's got. 336 00:14:32,800 --> 00:14:36,800 And the greater the chance it'll be able to overcome its own weight. 337 00:14:41,800 --> 00:14:45,800 This crazy commercial has got Carrie Grant and Tori thinking, 338 00:14:45,800 --> 00:14:46,800 is it real? 339 00:14:46,800 --> 00:14:51,800 Could you really create a surfable wave with dynamite? 340 00:14:53,800 --> 00:14:57,800 And if so, would any of the team be able to ride it? 341 00:14:57,800 --> 00:15:01,800 A trip to Santa Cruz later, and it's looking good on the surface. 342 00:15:02,800 --> 00:15:06,800 What about the surfing front? But what about the safety aspect? 343 00:15:06,800 --> 00:15:10,800 If you remember, an underwater pressure wave is fatal to fish. 344 00:15:10,800 --> 00:15:11,800 I killed it! 345 00:15:11,800 --> 00:15:14,800 But what about myth busters on a surfboard? 346 00:15:14,800 --> 00:15:18,800 To find out, Carrie has brought in underwater explosive expert Van Romero. 347 00:15:18,800 --> 00:15:23,800 What are the dangers of being in the water when there's an explosion? 348 00:15:23,800 --> 00:15:29,800 Well, when you detonate something underwater, it's much more dangerous than in the air. 349 00:15:29,800 --> 00:15:36,800 You're the same density as water, so the energy in the shockwave will easily be transferred from the water into your body. 350 00:15:36,800 --> 00:15:41,800 As the shockwave continues to go through your body, it reaches the surface of your lungs. 351 00:15:41,800 --> 00:15:44,800 And the inside of your lungs, the density is very low. 352 00:15:44,800 --> 00:15:47,800 When that happens, waves start bouncing all over the place, 353 00:15:47,800 --> 00:15:53,800 and as those, if your lung is subject to that, it'll start to bleed. 354 00:15:53,800 --> 00:15:58,800 So you won't die immediately, but you'll bleed to death in about 24 hours. 355 00:15:58,800 --> 00:16:03,800 Yup, the insurance doesn't cover that, which means they'll need a surfer substitute. 356 00:16:03,800 --> 00:16:06,800 A giant explosion, the Eiffel Shockwave. 357 00:16:06,800 --> 00:16:08,800 I think this is a job for Buster. 358 00:16:08,800 --> 00:16:11,800 Buster can't even stand up on his own. How's he gonna surf? 359 00:16:11,800 --> 00:16:15,800 You know, I don't even think he needs to stand. I tried the cobra position coming in on a few waves, and that worked great. 360 00:16:15,800 --> 00:16:16,800 Yeah, but he still needs to paddle. 361 00:16:16,800 --> 00:16:18,800 I got it! Robot! 362 00:16:18,800 --> 00:16:19,800 Yes! 363 00:16:19,800 --> 00:16:20,800 I knew it! 364 00:16:20,800 --> 00:16:23,800 Yes, mechanical paddling robot remote control. 365 00:16:23,800 --> 00:16:25,800 So you're gonna make a robot? 366 00:16:25,800 --> 00:16:27,800 Get it, row? 367 00:16:28,800 --> 00:16:31,800 Whoooooooo! 368 00:16:31,800 --> 00:16:32,800 A problem to solve? 369 00:16:32,800 --> 00:16:34,800 Ready to hang ten? 370 00:16:34,800 --> 00:16:36,800 And a robot to build. 371 00:16:36,800 --> 00:16:38,800 It's a little slice of grand heaven. 372 00:16:38,800 --> 00:16:45,800 Now, one of the most essential things about being able to catch a wave is to get up speed by paddling. 373 00:16:45,800 --> 00:16:49,800 And this, if you don't have enough speed, the wave's just gonna cross by you. 374 00:16:49,800 --> 00:16:56,800 So, I'm gonna make some steel arms, which are going to be Buster's arms, and those will be hooked to a motor. 375 00:16:56,800 --> 00:17:00,800 And as the wave is coming up, I'll start the motor spinning. 376 00:17:00,800 --> 00:17:06,800 That will start the arms of paddling, and you get Buster's speed up so that hopefully, when the wave hits, 377 00:17:06,800 --> 00:17:09,800 he'll be at exactly the right speed and take off. 378 00:17:09,800 --> 00:17:14,800 And while Grant finishes the motor to power the paddles, he's drafting Carrie for some help. 379 00:17:14,800 --> 00:17:22,800 What we're gonna do is trace out an arm profile, and then cut it out of steel. 380 00:17:22,800 --> 00:17:26,800 So, you want to use my arms because they're big and muscular. Is that what you're bringing me over for? 381 00:17:26,800 --> 00:17:30,800 No, no, you're gonna trace my arms, because they're paddling. 382 00:17:30,800 --> 00:17:36,800 But mine have more length, so you could, you know, whew, whew, whew, a lot faster. 383 00:17:36,800 --> 00:17:39,800 Sorry, the piece of steel I bought will fit my arm. 384 00:17:39,800 --> 00:17:42,800 Okay, so do you want me to put a muscle on it? 385 00:17:42,800 --> 00:17:45,800 I'll get a pen. 386 00:17:45,800 --> 00:17:52,800 With Carrie on arm duty, the guys soon whip the body into shape, including a remote control rudder. 387 00:17:52,800 --> 00:17:56,800 AB foam legs and torso modeled, of course, on Grant. 388 00:17:56,800 --> 00:17:58,800 Ta-da! 389 00:17:58,800 --> 00:18:00,800 And a quick paint job. 390 00:18:00,800 --> 00:18:04,800 Okay, so the remote controlled surfing robot is finally done. 391 00:18:04,800 --> 00:18:09,800 It consists of a 10-foot foam board with a paddling mechanism. 392 00:18:09,800 --> 00:18:13,800 It has a swivel, just like your real body would move as you paddle out. 393 00:18:13,800 --> 00:18:19,800 All the electronics are encased in a waterproof enclosure, has a 12-volt battery. 394 00:18:19,800 --> 00:18:23,800 For minor adjustments, there's also a rudder on the back. 395 00:18:23,800 --> 00:18:26,800 And the waves over here, perfect. 396 00:18:26,800 --> 00:18:29,800 Now start paddling, dude! Paddle! 397 00:18:29,800 --> 00:18:33,800 Okay, it's good to go. I'm ready to hit the waves. 398 00:18:33,800 --> 00:18:37,800 So we have our surfer, Frank, bringing the explosives, and our researchers found us a lake. 399 00:18:37,800 --> 00:18:42,800 Yeah, it's an angels camp, and it's a quarry lake, so there's nothing to be killed by the explosion. 400 00:18:42,800 --> 00:18:46,800 So no fish-and-a-barrel type, lethal shockwave of death. 401 00:18:46,800 --> 00:18:49,800 Yeah, well let's get up there and start making waves. 402 00:18:50,800 --> 00:18:55,800 So this beautiful quarry lake is the location for the final experiment. 403 00:18:55,800 --> 00:18:58,800 How's he gonna hang ten? He got no feet. 404 00:18:58,800 --> 00:19:02,800 And the first order of business is a test run with the surfing robot. 405 00:19:02,800 --> 00:19:09,800 I am feeling a little nervous at this point, because none of us are gonna be allowed to surf. 406 00:19:09,800 --> 00:19:12,800 This is our only option for testing the myth. 407 00:19:12,800 --> 00:19:14,800 You look nervous. 408 00:19:14,800 --> 00:19:16,800 Yeah, I'm a little nervous. 409 00:19:16,800 --> 00:19:26,800 Now, that having been said, I'm hoping that Robo Grant has been imbued with the natural surfing talent that Real Grant has. 410 00:19:26,800 --> 00:19:28,800 Well, didn't flip over. 411 00:19:28,800 --> 00:19:33,800 Yep, it looks like Grant has imbued Robo Grant with all of his surfing powers. 412 00:19:33,800 --> 00:19:36,800 Let me try them. Thank you. 413 00:19:37,800 --> 00:19:41,800 Grant switches the paddle action from freestyle to butterfly. 414 00:19:41,800 --> 00:19:43,800 Oh yeah, he is faster though. 415 00:19:43,800 --> 00:19:45,800 Searched up, dude. 416 00:19:45,800 --> 00:19:47,800 So Robo Grant's good to go. 417 00:19:47,800 --> 00:19:49,800 Yeah, spank that water. 418 00:19:49,800 --> 00:19:53,800 But Kari's concerned about our evil geniuses motives. 419 00:19:53,800 --> 00:19:58,800 Does anybody find it creepy how many Grant robots have been on the show? 420 00:19:58,800 --> 00:20:02,800 Is it just me or is he trying to like clone himself and make a little army? 421 00:20:02,800 --> 00:20:04,800 I like it, I think we're keeping it. 422 00:20:07,800 --> 00:20:16,800 The Crucian thing about an adage is the kernel of truth it's based on has become accepted over time. 423 00:20:16,800 --> 00:20:20,800 But mythbusters don't accept the truth, they test it. 424 00:20:20,800 --> 00:20:25,800 And to test the truth of the adage to go down like a lead balloon, they're building one. 425 00:20:25,800 --> 00:20:29,800 Who's done this before? Nobody! 426 00:20:29,800 --> 00:20:33,800 I don't know, what do you think the plan should be for going full scale? 427 00:20:33,800 --> 00:20:39,800 I'm not really in love with that burrito shape, I mean it kind of started to work but it doesn't look like a balloon 428 00:20:39,800 --> 00:20:42,800 and I think it won't handle the stresses once we get much larger. 429 00:20:42,800 --> 00:20:47,800 You're right, and both of these require so much manipulation of the foil. 430 00:20:47,800 --> 00:20:51,800 I mean the one thing we learn from the lead foil is it's way too delicate to make a shape like this. 431 00:20:51,800 --> 00:20:58,800 Yeah, we need to figure out a way of just building it in place and not touching it, just inflating it from there. 432 00:20:58,800 --> 00:21:06,800 I've got an idea that may work. It involves laying the material out piece by piece and taping it as it goes down so we only move it once. 433 00:21:06,800 --> 00:21:13,800 And then hopefully when we inflate it it would unfold, it would be just one of the simplest platonic solids. 434 00:21:13,800 --> 00:21:15,800 So it'll open like a flower. 435 00:21:15,800 --> 00:21:17,800 Exactly, let me try and work that out. 436 00:21:17,800 --> 00:21:21,800 And so our swami of origami goes to work. 437 00:21:21,800 --> 00:21:27,800 The biggest problem that the lead is giving us is that it's delicate and we can't go lifting up huge sheets of it to tape these things. 438 00:21:27,800 --> 00:21:32,800 We have to build our three-dimensional shape flat and then inflate it. 439 00:21:32,800 --> 00:21:40,800 Use the spread distributed load of the helium to bring this thing out into three dimensions. 440 00:21:40,800 --> 00:21:42,800 We can't move the lead around too much. 441 00:21:42,800 --> 00:21:52,800 So I'm going to try and design a way to make a cube so that we lay it out panel by panel flat and then we can inflate it. 442 00:21:52,800 --> 00:21:57,800 Ha ha ha ha ha ha, it works. 443 00:21:57,800 --> 00:22:04,800 Alright, there it is. That's the deal. 444 00:22:04,800 --> 00:22:09,800 With the design and construction map worked out, Adam crunches the all-important numbers. 445 00:22:09,800 --> 00:22:12,800 Roughly 11 kilograms. 446 00:22:12,800 --> 00:22:19,800 He's planning to use 640 square feet of lead, which weighs 11 kilos or 24 pounds. 447 00:22:19,800 --> 00:22:23,800 But will the helium inside that cube have enough lift? 448 00:22:23,800 --> 00:22:29,800 In its cubular form, this thing's going to have 30 kilograms, roughly 70 pounds of lift. 449 00:22:29,800 --> 00:22:33,800 That's far more than the lead that makes it up is going to weigh. 450 00:22:33,800 --> 00:22:39,800 In fact, we'll have so much pointcy out of this that in order to get it fully inflated, I think we're going to have to add some air. 451 00:22:39,800 --> 00:22:42,800 We're going to have to thin out our helium. 452 00:22:42,800 --> 00:22:45,800 That's great, we're weighing the green on this. 453 00:22:45,800 --> 00:22:53,800 So it's full-scale ahead, but the idiosyncrasies of the material mean Jamie's having to go to extraordinary lengths. 454 00:22:53,800 --> 00:23:01,800 This lead balloon is going to be so big that we've got to make special rigs just to get over top of these panels while we're assembling them. 455 00:23:01,800 --> 00:23:07,800 We can't obviously just crawl all over it because the lead is so delicate we'll puncture it in that process. 456 00:23:07,800 --> 00:23:14,800 Therefore, I'm making a big swinging boom arm that we can put on a forklift to put one of us out on the boom. 457 00:23:14,800 --> 00:23:23,800 We'll be on a sort of a car that will have a basket that will be in so our arms can hang down right over top of what we're working on. 458 00:23:23,800 --> 00:23:26,800 Dude, this is elegant and simple. 459 00:23:26,800 --> 00:23:27,800 Damn it. 460 00:23:27,800 --> 00:23:30,800 What we would always want on MythBusters. 461 00:23:31,800 --> 00:23:33,800 Gonna make a lead balloon! 462 00:23:33,800 --> 00:23:36,800 Adam and Jamie have arrived at the Alameda Naval Base. 463 00:23:38,800 --> 00:23:45,800 We've chosen this because we've got plenty of room to fly, we've got no wind, we've got a nice flat surface to build on. 464 00:23:45,800 --> 00:23:48,800 And today we're making our lead balloon. 465 00:23:48,800 --> 00:23:52,800 Or at least that's the plan because the myth states that it's impossible. 466 00:23:52,800 --> 00:23:55,800 A challenge Adam and Jamie seem to be taking personally. 467 00:23:55,800 --> 00:23:59,800 This whole build depends on how carefully we do this. 468 00:23:59,800 --> 00:24:04,800 Success or failure depends on all the little details like a smooth floor. 469 00:24:04,800 --> 00:24:06,800 Why is that piece of tape there? 470 00:24:06,800 --> 00:24:10,800 Well we have dirt on this floor and we've gone through and we've swept it like several times. 471 00:24:10,800 --> 00:24:14,800 We're scraping any little bits of tape or anything that we can get off of it. 472 00:24:14,800 --> 00:24:15,800 It has to be pristine. 473 00:24:15,800 --> 00:24:17,800 We're gonna lay down paper. 474 00:24:17,800 --> 00:24:19,800 We're gonna be wearing booties when we're working around this. 475 00:24:19,800 --> 00:24:21,800 This is gonna be like a medical procedure. 476 00:24:21,800 --> 00:24:24,800 Okay everybody, this is no walk zone. 477 00:24:24,800 --> 00:24:29,800 With military like precision, Jamie directs preparation of the assembly area. 478 00:24:29,800 --> 00:24:32,800 Ready for Adam's origami design. 479 00:24:32,800 --> 00:24:34,800 Yeah, there you go. That's it. 480 00:24:34,800 --> 00:24:40,800 This is basically going to be a 10 foot by 10 foot by 10 foot cube of lead. 481 00:24:40,800 --> 00:24:42,800 So, 10 foot. 482 00:24:42,800 --> 00:24:44,800 Our construction plan is pretty simple. 483 00:24:44,800 --> 00:24:47,800 Jamie will be assembling squares while I'm assembling the regular balloon. 484 00:24:47,800 --> 00:24:49,800 And here's the plan I worked out in the shop. 485 00:24:49,800 --> 00:24:51,800 It's 12 steps, 12 pieces of lead. 486 00:24:51,800 --> 00:24:57,800 Each square gets assembled over on the assembly square and then put together on the home square. 487 00:24:57,800 --> 00:25:02,800 With rubber gloves to protect against what is after all a poisonous material. 488 00:25:02,800 --> 00:25:06,800 The guys begin building the ambitious 12 step plan. 489 00:25:06,800 --> 00:25:14,800 Adam is putting the actual cube together on the home square while Jamie production lines the larger pieces from the 15 inch rolls. 490 00:25:14,800 --> 00:25:19,800 I've got the first side completed and oddly enough it's the bottom. 491 00:25:19,800 --> 00:25:21,800 It's about 100 square feet of lead. 492 00:25:21,800 --> 00:25:23,800 It used up two rolls. 493 00:25:23,800 --> 00:25:31,800 Jamie is working on the second sheet which actually will get cut into triangles to start our actual origami assembly process. 494 00:25:32,800 --> 00:25:38,800 The first square is coming off the assembly line. 495 00:25:38,800 --> 00:25:44,800 And according to Adam's grand origami plan it gets cut into equilateral triangles. 496 00:25:44,800 --> 00:25:46,800 Okay, the first one's coming off. 497 00:25:46,800 --> 00:25:50,800 Before being moved into position on the home square. 498 00:25:50,800 --> 00:25:51,800 It's pretty darn good. 499 00:25:51,800 --> 00:25:55,800 The ingeniously named step two is complete. 500 00:25:55,800 --> 00:25:59,800 When piece two is taped into position, cue the cable car. 501 00:25:59,800 --> 00:26:02,800 What we have here is the largest clear tape dispenser in the world. 502 00:26:02,800 --> 00:26:07,800 Simply insert an atom to tape in all those awkward, hard to reach places. 503 00:26:07,800 --> 00:26:09,800 I've never built anything like this before. 504 00:26:09,800 --> 00:26:14,800 The final result is going to be about seven or eight layers thick in some places. 505 00:26:14,800 --> 00:26:17,800 That's as thick as one of your hairs. 506 00:26:17,800 --> 00:26:21,800 That's how thin the material we're working with is. 507 00:26:21,800 --> 00:26:26,800 So the difference over here in the home square from step one to step 12, nothing. 508 00:26:26,800 --> 00:26:28,800 You're not going to see a darn thing. 509 00:26:28,800 --> 00:26:31,800 Just at one point we're going to start inflating. 510 00:26:31,800 --> 00:26:34,800 It's going to work like a popcorn popper, hopefully. 511 00:26:41,800 --> 00:26:46,800 After seeing this internet video, Carrie Grant and Tori couldn't resist the myth 512 00:26:46,800 --> 00:26:50,800 that it's possible to catch a wave created by dynamite. 513 00:26:50,800 --> 00:26:55,800 And with RoboGrant all set to surf, Carrie and Tori head out onto the lake 514 00:26:55,800 --> 00:26:57,800 to work out where to place the explosives. 515 00:26:57,800 --> 00:27:01,800 First up, Tori and I are going on a recon mission to figure out what the bottom of the lake bed looks like. 516 00:27:01,800 --> 00:27:05,800 We have a depth finder and the sheriff's department has lent us a boat. 517 00:27:05,800 --> 00:27:10,800 Okay, so we can put the surfer right there and then we can measure back for where we want the explosive. 518 00:27:10,800 --> 00:27:15,800 That's the location, but what about the strength and depth of the charge? 519 00:27:15,800 --> 00:27:19,800 Alright, so our shop test showed that the depth, it definitely is a factor at the size of the wave. 520 00:27:19,800 --> 00:27:23,800 Now that we're out here, why don't we try setting our explosions at different depths 521 00:27:23,800 --> 00:27:25,800 just to see what kind of waves we get? 522 00:27:25,800 --> 00:27:29,800 Well, just to start, we've got 50 pounds. You want to put it about 30 feet, see what happens? 523 00:27:29,800 --> 00:27:30,800 Sounds good. 524 00:27:30,800 --> 00:27:35,800 Now, since we don't really know exactly what depth we want to do this at, we're just trying to figure it out, 525 00:27:35,800 --> 00:27:43,800 I was wondering maybe we should save RoboGrant until we know we got a good depth and we know we're going to get a good wave. 526 00:27:43,800 --> 00:27:44,800 Great. 527 00:27:44,800 --> 00:27:45,800 You don't want to wreck them yet? 528 00:27:45,800 --> 00:27:46,800 Not yet. 529 00:27:46,800 --> 00:27:51,800 Remember, in the viral video, it looks like they use three or four sticks of dynamite. 530 00:27:52,800 --> 00:27:54,800 Maybe three pounds? 531 00:27:54,800 --> 00:27:59,800 But retired FBI agent Frank Doyle thinks that just won't cut it. 532 00:27:59,800 --> 00:28:06,800 He suggests starting with 50 pounds of the high explosive Trinitrotoluene, or TNT. 533 00:28:10,800 --> 00:28:11,800 We're ready to go. 534 00:28:11,800 --> 00:28:12,800 Go. 535 00:28:12,800 --> 00:28:14,800 There we go! 536 00:28:14,800 --> 00:28:16,800 There we go! 537 00:28:16,800 --> 00:28:18,800 There we go! 538 00:28:18,800 --> 00:28:21,800 Three, two, one! 539 00:28:24,800 --> 00:28:26,800 Did you feel the wind? 540 00:28:28,800 --> 00:28:31,800 Okay, wait, that was 50 pounds. Let's see what kind of wave rolls in. 541 00:28:31,800 --> 00:28:32,800 Well, that's pretty huge. 542 00:28:32,800 --> 00:28:37,800 That was amazing. That was 50 pounds of TNT, 30 feet deep. 543 00:28:37,800 --> 00:28:42,800 What? The wave that ended up making it to the shore? Maybe about an inch high. 544 00:28:44,800 --> 00:28:47,800 Yeah, that energy just totally wasted too deep. 545 00:28:47,800 --> 00:28:49,800 Okay, let's split the difference. Let's bring it up to like 12 feet. 546 00:28:49,800 --> 00:28:51,800 Sounds good to me. 547 00:28:51,800 --> 00:28:52,800 Great. 548 00:28:52,800 --> 00:29:02,800 So what we saw in here was the same kind of behavior we saw in our shop test, which was if you have the charge too deep under too much water, you just get a big kind of thud and no waves. 549 00:29:02,800 --> 00:29:03,800 Make the drop. 550 00:29:03,800 --> 00:29:08,800 So what we're going to do now is move the charge a little bit closer to the surface. 551 00:29:08,800 --> 00:29:10,800 Explosives on the water going down. 552 00:29:10,800 --> 00:29:16,800 And see if we can get more of that energy out and hopefully creating a wave. 553 00:29:16,800 --> 00:29:23,800 All right, Frank, 12 foot depth with 50 pounds of TNT. Let it rip. 554 00:29:23,800 --> 00:29:28,800 Three, two, one, wave! 555 00:29:28,800 --> 00:29:31,800 Wow! 556 00:29:31,800 --> 00:29:34,800 We can't lift the wave. 557 00:29:34,800 --> 00:29:37,800 Oh yeah! 558 00:29:37,800 --> 00:29:38,800 I like it. 559 00:29:38,800 --> 00:29:40,800 Surf's up, man. 560 00:29:40,800 --> 00:29:41,800 It's still coming. 561 00:29:41,800 --> 00:29:44,800 That's about what? Six inches, maybe a foot? 562 00:29:44,800 --> 00:29:47,800 Yeah, the peak of the leading wave looks to be a foot high. 563 00:29:47,800 --> 00:29:53,800 A huge improvement on the 30 foot test, which means the team are happy with the depth of the charge. 564 00:29:53,800 --> 00:29:54,800 12 feet. 565 00:29:54,800 --> 00:29:56,800 It's breaking. 566 00:29:56,800 --> 00:29:57,800 It's breaking. 567 00:29:57,800 --> 00:29:58,800 Yeah! 568 00:29:58,800 --> 00:30:00,800 Little waves. 569 00:30:00,800 --> 00:30:03,800 Next, they want to supersize those waves. 570 00:30:03,800 --> 00:30:07,800 For that, they're going for broke and using their entire supplies. 571 00:30:07,800 --> 00:30:09,800 We want to get on the corner with this. 572 00:30:09,800 --> 00:30:13,800 We're talking about a body bag filled with TNT. 573 00:30:13,800 --> 00:30:15,800 That's 200 pounds. 574 00:30:15,800 --> 00:30:17,800 This should be a really big explosion. 575 00:30:17,800 --> 00:30:20,800 Let us know if you're going to fade back there. 576 00:30:20,800 --> 00:30:23,800 Okay, let's put things into perspective. 577 00:30:23,800 --> 00:30:29,800 This little explosion was a mere half pound of TNT. 578 00:30:29,800 --> 00:30:31,800 Look at the door! 579 00:30:31,800 --> 00:30:32,800 Wow! 580 00:30:32,800 --> 00:30:39,800 So if 200 pounds of TNT doesn't whip up a wave, this myth is truly busted. 581 00:30:39,800 --> 00:30:43,800 Waiting in the wings for his big debut is Robo Grant. 582 00:30:43,800 --> 00:30:48,800 But before the big blast, the real Grant takes time out for a quick pep talk. 583 00:30:48,800 --> 00:30:49,800 Okay, buddy. 584 00:30:49,800 --> 00:30:52,800 Needless to say, this entire experiment rests on you. 585 00:30:52,800 --> 00:30:54,800 This is your time to shine. 586 00:30:54,800 --> 00:30:58,800 You've got a long history of robotic friends to live up to. 587 00:30:58,800 --> 00:31:03,800 Robo Cat, the Mad Batter, the Swordswinging Robot. 588 00:31:03,800 --> 00:31:04,800 This is your chance, man. 589 00:31:04,800 --> 00:31:05,800 All right? 590 00:31:05,800 --> 00:31:06,800 Go out there. 591 00:31:06,800 --> 00:31:07,800 Make us proud. 592 00:31:07,800 --> 00:31:10,800 All right, slap away! 593 00:31:10,800 --> 00:31:13,800 Good luck, buddy! 594 00:31:13,800 --> 00:31:17,800 Robo Grant paddles out to a predetermined distance from ground zero, 595 00:31:17,800 --> 00:31:19,800 while Frank coordinates the drop 596 00:31:19,800 --> 00:31:23,800 before everyone retreats to a safe distance. 597 00:31:23,800 --> 00:31:25,800 This is the big one, you guys. 598 00:31:25,800 --> 00:31:28,800 We're commencing the firing sequence. 599 00:31:28,800 --> 00:31:30,800 Fire in the hole! 600 00:31:30,800 --> 00:31:31,800 Yeah! 601 00:31:31,800 --> 00:31:32,800 There we go. 602 00:31:32,800 --> 00:31:33,800 Got it. 603 00:31:33,800 --> 00:31:34,800 I'm good. 604 00:31:34,800 --> 00:31:35,800 Straighten them up. 605 00:31:35,800 --> 00:31:36,800 Here we go. 606 00:31:36,800 --> 00:31:37,800 He's going! 607 00:31:37,800 --> 00:31:38,800 Yeah, dude. 608 00:31:38,800 --> 00:31:39,800 He's going! 609 00:31:39,800 --> 00:31:40,800 Perfect line. 610 00:31:40,800 --> 00:31:41,800 I have speed! 611 00:31:41,800 --> 00:31:42,800 I have speed! 612 00:31:42,800 --> 00:31:45,800 Three, two, one. 613 00:31:45,800 --> 00:31:46,800 Next. 614 00:31:50,800 --> 00:31:54,800 Adam and Jamie are testing the accepted truth in the idiom 615 00:31:54,800 --> 00:31:56,800 to go down like a lead balloon. 616 00:31:56,800 --> 00:32:00,800 And if they manage to fly this huge heavy metal inflatable, 617 00:32:00,800 --> 00:32:02,800 it's myth busted. 618 00:32:02,800 --> 00:32:06,800 I define flight as balloon off the ground. 619 00:32:06,800 --> 00:32:11,800 As soon as the balloon is buoyant enough to support its own weight 620 00:32:11,800 --> 00:32:14,800 on top of the helium that's inside of it, 621 00:32:14,800 --> 00:32:16,800 then I say that we've got flight. 622 00:32:16,800 --> 00:32:20,800 Everything after that is just gravy. 623 00:32:20,800 --> 00:32:26,800 The final step in Adam's design, the 12th, is in sight. 624 00:32:26,800 --> 00:32:28,800 Back to the map. 625 00:32:28,800 --> 00:32:31,800 The pressure is on for Adam to get these final pieces right, 626 00:32:31,800 --> 00:32:33,800 but he won't know until they inflate it 627 00:32:33,800 --> 00:32:37,800 if his origami cube has been taped together correctly. 628 00:32:37,800 --> 00:32:38,800 So this is the moment of truth. 629 00:32:38,800 --> 00:32:39,800 We are... 630 00:32:39,800 --> 00:32:41,800 This is one of the many moments of truth, 631 00:32:41,800 --> 00:32:43,800 but we're just about to put the top piece, 632 00:32:43,800 --> 00:32:46,800 number 12, on the structure here, 633 00:32:46,800 --> 00:32:48,800 and then tape it all the way around. 634 00:32:48,800 --> 00:32:50,800 After that, there's some rigour maroll, 635 00:32:50,800 --> 00:32:52,800 but pretty much we're ready to fill. 636 00:32:52,800 --> 00:32:54,800 This might just work. 637 00:32:54,800 --> 00:32:57,800 Oh, no, no, no. It's not going to work. 638 00:32:57,800 --> 00:33:00,800 They're close, but getting that final piece onto the home square 639 00:33:00,800 --> 00:33:02,800 is proving a challenge. 640 00:33:02,800 --> 00:33:04,800 Hold on, hold on. I'm not there. 641 00:33:04,800 --> 00:33:06,800 With everyone's patience as thin as the foil, 642 00:33:06,800 --> 00:33:10,800 tempers and frustrations are only just kept in check. 643 00:33:10,800 --> 00:33:11,800 Slow down, slow down. 644 00:33:11,800 --> 00:33:12,800 Everybody's slow. 645 00:33:12,800 --> 00:33:14,800 Okay, stop. Stop. 646 00:33:14,800 --> 00:33:15,800 But they finally get there 647 00:33:15,800 --> 00:33:17,800 and with piece number 12 648 00:33:17,800 --> 00:33:18,800 taped into position, 649 00:33:18,800 --> 00:33:20,800 Adam bounces back. 650 00:33:20,800 --> 00:33:21,800 I'm now feeling so optimistic 651 00:33:21,800 --> 00:33:22,800 that we're going to get buoyancy 652 00:33:22,800 --> 00:33:24,800 that I'm going to shoot even higher. 653 00:33:24,800 --> 00:33:28,800 And I want this thing looking like a real inflatable balloon, 654 00:33:28,800 --> 00:33:30,800 like with a basket, 655 00:33:30,800 --> 00:33:32,800 and with passengers. 656 00:33:32,800 --> 00:33:35,800 Ha, ha, ha, ha, ha, ha, ha, ha. 657 00:33:35,800 --> 00:33:38,800 Yes, Jamie and I are going to go for a ride 658 00:33:38,800 --> 00:33:39,800 in the lead balloon. 659 00:33:39,800 --> 00:33:44,340 balloon. Their thin flat-pack cube is complete, but how are they going to 660 00:33:44,340 --> 00:33:46,880 inflate it? Jamie and I have been thinking about ways in which this will 661 00:33:46,880 --> 00:33:52,140 fail spectacularly. We're both nervous about this little area in the middle that 662 00:33:52,140 --> 00:33:57,080 has to open like a flower with four edges scraping over each other. And to 663 00:33:57,080 --> 00:34:01,140 hopefully counter-evaluate this, we are going to be filling this balloon both into 664 00:34:01,140 --> 00:34:06,540 the bottom and into the top. We're hoping to pillow it up so the parts will move 665 00:34:06,580 --> 00:34:10,260 and slide over each other with a little less stress than just from the bottom 666 00:34:10,260 --> 00:34:14,700 having to lift like three-quarters of the weight of the balloon. Alright, so 640 667 00:34:14,700 --> 00:34:19,740 square feet of lead, 11 kilograms, 1200 feet of helium. You ready? It's going up. 668 00:34:19,740 --> 00:34:24,300 You gonna man the valves? I'll do that. Alright. Adam is understandably nervous. 669 00:34:24,300 --> 00:34:29,620 His clever design is on the line and as Jamie opens up the helium, one thing's 670 00:34:29,620 --> 00:34:35,220 apparent. It's going to take a while. It's going to be an excruciatingly slow 671 00:34:35,260 --> 00:34:39,420 process. This is the hard part. If we get past this, we're golden. 672 00:34:43,420 --> 00:34:48,420 It's the big one, you guys. Carrie Grant and Tori are just about to put the myth of 673 00:34:48,420 --> 00:34:55,660 surfing with dynamite to the ultimate test. A few feet below the surface of 674 00:34:55,660 --> 00:35:03,820 this quarry lake is 200 pounds of TNT and closer than any human could get is 675 00:35:03,860 --> 00:35:09,420 Robo Grant, the surfing robot hanging out for the perfect wave. I have speed. I 676 00:35:09,420 --> 00:35:12,060 have speed. Here we go. 677 00:35:23,700 --> 00:35:27,580 It was a huge explosion, but is the wave actually surfable? 678 00:35:28,460 --> 00:35:35,580 Robo Grant is paddling furiously and Grant keeps his stunt double on course. 679 00:35:35,580 --> 00:35:45,700 But the wave just rolls right under the surfboard. Despite the outrageously over 680 00:35:45,700 --> 00:35:52,980 the top quantity of TNT, the wave still wasn't surfable. As it radiates from the 681 00:35:53,020 --> 00:35:58,100 epicenter in an ever increasing circle, it runs out of energy, leaving Robo 682 00:35:58,100 --> 00:36:03,020 Grant thinking about his next trip to Maui, unlike the team who when they get a 683 00:36:03,020 --> 00:36:06,780 bang like this are always satisfied. 684 00:36:06,780 --> 00:36:09,780 That was beautiful. Nice job, Al. 685 00:36:09,780 --> 00:36:11,780 Nice job. 686 00:36:15,780 --> 00:36:20,700 That was not anything like the video at all. That was definitely CG and I see one major flaw 687 00:36:20,940 --> 00:36:25,620 with a wave being surfed from an explosion. It's you get a radial wave and it just 688 00:36:25,620 --> 00:36:29,020 dissipates too small. It's not like the ocean where it just carries on. 689 00:36:29,020 --> 00:36:33,140 Yeah, you know he was paddling and paddling and he had enough speed and he looked 690 00:36:33,140 --> 00:36:36,020 like he was starting to catch it but then the wave went away. 691 00:36:36,020 --> 00:36:40,820 Just kind of went, but I mean you can't get a bigger explosion than that for what 692 00:36:40,820 --> 00:36:45,260 we're doing. That was amazing. That was perfect. But on top of all that, if you were 693 00:36:45,260 --> 00:36:49,020 in the water and a bomb that big went off that close to you, you would be dead. 694 00:36:49,340 --> 00:36:51,340 Yeah, so this one's totally busted. 695 00:36:51,340 --> 00:36:53,340 Busted! 696 00:37:02,340 --> 00:37:09,340 Adam and Jamie's mythical lead balloon is in fact complete. The guys are in the process 697 00:37:09,700 --> 00:37:15,700 of inflating their inflatable but it's not as simple as it sounds and it's taking a while. 698 00:37:15,700 --> 00:37:19,580 Well, we've encountered our first slight difficulty which is that the helium doesn't 699 00:37:19,580 --> 00:37:23,460 fill this thing in any kind of even fashion. So as you can see it's heavily weighted towards 700 00:37:23,460 --> 00:37:28,020 one side and I don't want to put too much stress on one part of this balloon. I would 701 00:37:28,020 --> 00:37:32,420 like to even it out as much as I can. So we're going to take a big plastic drop cloth, lay 702 00:37:32,420 --> 00:37:38,420 it over this and use it to kind of even out the helium's filling of the balloon. 703 00:37:38,420 --> 00:37:40,420 Hopefully that'll keep it stable. 704 00:37:40,420 --> 00:37:43,980 I like it. That'll add better. Yeah, me too. 705 00:37:43,980 --> 00:37:50,980 Without a monitoring and fretting over even the slightest tear, I'm nervous because of 706 00:37:50,980 --> 00:37:54,980 the way I saw some cold, gradient hairs in a burrito. But right now I'm conditionally 707 00:37:54,980 --> 00:37:55,980 happy. 708 00:37:55,980 --> 00:38:01,380 And Jamie carefully controlling the flow of helium and air into the top and bottom of 709 00:38:01,380 --> 00:38:05,140 the cube. It slowly but surely rises. 710 00:38:05,140 --> 00:38:10,260 We're putting air in this because we think we actually have too much buoyancy. We want 711 00:38:10,260 --> 00:38:15,100 it to just barely come off the ground. Otherwise we're reliable to rip something. If we can 712 00:38:15,100 --> 00:38:18,580 get it so ever so gently goes up, we're golden. 713 00:38:18,580 --> 00:38:23,260 By mixing the heavier and less buoyant air with helium, they're hoping to prevent any 714 00:38:23,260 --> 00:38:27,140 sudden lift that would tear the delicate lead foil apart. 715 00:38:27,140 --> 00:38:30,860 Okay, before it becomes too much trouble, I want to pull the visqueen off and have everyone 716 00:38:30,860 --> 00:38:31,860 grab the cords. 717 00:38:31,860 --> 00:38:32,860 Whatever you think. 718 00:38:32,860 --> 00:38:33,860 Okay. 719 00:38:33,860 --> 00:38:38,260 Adam directs his troops and the plastic drop cloth is carefully removed. 720 00:38:38,260 --> 00:38:42,460 It's looking good. It's looking good. Okay, everyone go ahead and let it up a little bit. 721 00:38:42,460 --> 00:38:43,860 Go ahead. Let's get some helium. 722 00:38:43,860 --> 00:38:48,500 And the flat pack origami cube slowly comes to life. 723 00:38:48,500 --> 00:38:51,660 I don't see any major holes. I don't see any major failure points, but we're keeping 724 00:38:51,660 --> 00:38:53,660 a close eye on it. 725 00:38:53,660 --> 00:38:55,660 Hey, Adam. 726 00:38:55,660 --> 00:38:56,660 Yeah. 727 00:38:56,660 --> 00:39:01,260 Congratulations on the design. It unfolded and twisted out just the way it was supposed 728 00:39:01,260 --> 00:39:04,900 to. Whether it flies or not, I don't know, but your plan worked. 729 00:39:04,900 --> 00:39:06,740 I'm really psyched about this one. 730 00:39:06,740 --> 00:39:11,540 The cube may be taking shape, but with the containment of the plastic gone, the foil 731 00:39:11,540 --> 00:39:13,540 is free to shift and ripple. 732 00:39:13,540 --> 00:39:15,540 There we go. I knew I felt something. 733 00:39:15,540 --> 00:39:17,980 There's a big rip here. 734 00:39:17,980 --> 00:39:20,660 And suddenly the build picks up pace. 735 00:39:20,660 --> 00:39:21,660 Opening tank three. 736 00:39:21,660 --> 00:39:24,180 I got a hole. 737 00:39:24,180 --> 00:39:26,180 Teetering on the tipping point of failure. 738 00:39:26,180 --> 00:39:28,180 Good. Hold on tight to that. 739 00:39:28,180 --> 00:39:30,180 And the promise of flight. 740 00:39:30,180 --> 00:39:36,620 Hold on to it. Hold on to it. Hold on. That's it. 741 00:39:36,620 --> 00:39:37,620 Bottoms up. 742 00:39:37,620 --> 00:39:39,620 And tears up here everywhere. 743 00:39:39,620 --> 00:39:46,100 But like the little boy in the dyke, Adam stays ahead of the leaks, and incredibly, the lead 744 00:39:46,100 --> 00:39:48,100 balloon keeps rising. 745 00:39:48,100 --> 00:39:55,500 It's a balloon. It's made out of lead and it's up there. It's floating, that'll work. 746 00:39:55,500 --> 00:39:59,320 But Adam, for one, ain't satisfied with just off the ground. 747 00:39:59,320 --> 00:40:01,760 I still want more balloon. 748 00:40:01,760 --> 00:40:02,760 That's out of it. 749 00:40:02,760 --> 00:40:03,760 I know. 750 00:40:03,760 --> 00:40:08,800 Bells and baskets he can get without requiring expensive insurance our 751 00:40:08,800 --> 00:40:14,080 disposable hosts are in the basket ready for lift off and with a few more gentle 752 00:40:14,080 --> 00:40:19,140 blasts of helium the real Adam and Jamie watch their experiment go up like a 753 00:40:19,140 --> 00:40:21,220 lead balloon. 754 00:40:21,220 --> 00:40:23,220 Dude! 755 00:40:23,220 --> 00:40:27,220 That is a lead balloon. 756 00:40:27,220 --> 00:40:30,220 I am really pleased. 757 00:40:30,680 --> 00:40:35,800 We might have been able to get away with a smaller balloon but this is a lead 758 00:40:35,800 --> 00:40:38,300 balloon. We did it. 759 00:40:38,300 --> 00:40:42,100 That worked beautifully. It's perfect. 760 00:40:42,100 --> 00:40:49,260 11 kilos of lead hanging right over my head and if I let this go it's going up. 761 00:40:49,260 --> 00:40:51,760 It's just amazing. 762 00:40:51,760 --> 00:40:55,360 Well I tell you that might be ridiculously impractical but you know if 763 00:40:55,360 --> 00:40:59,220 someone says it's impossible we just take it as a challenge. 764 00:40:59,720 --> 00:41:01,720 Busted Idiom! 765 00:41:03,720 --> 00:41:07,220 Which leaves just one thing left to do. 766 00:41:07,220 --> 00:41:08,720 How are we going to get it down? 767 00:41:08,720 --> 00:41:10,220 How about with a baseball? 768 00:41:10,220 --> 00:41:11,720 It's time to destroy it. 769 00:41:11,720 --> 00:41:12,720 It was inevitable really. 770 00:41:12,720 --> 00:41:13,720 Go ahead and throw it. 771 00:41:13,720 --> 00:41:19,720 Like a sandcastle at the end of a summer's day the kids can't help but destroy their creation. 772 00:41:26,720 --> 00:41:27,720 There it is. 773 00:41:28,720 --> 00:41:29,720 Alright. 774 00:41:29,720 --> 00:41:31,720 That's a chunk of lead. 775 00:41:31,720 --> 00:41:33,720 Good job well done. Let's go. 776 00:41:38,720 --> 00:41:41,720 So do you think we could actually make a lead zeppelin?