MythBusters, 2006

Adam:
This is one I've known about for a long time, it's called "Dry Ice Bomb." Years ago I went to an ice company to pick up some stuff for Jamie, this was like 20 years ago, 15 years ago, and it said: "You cannot buy dry ice unless you are 18", and I thought: "Why would that be?" so I said "Hey, how come you can't buy dry ice unless you are over 18", and the guy goes: (assumes a "surfer dude" voice) "Oh, 'cause you can stick it in a 2-liter bottle and make a huge bomb out of it; it blows up, it'll, like, set car alarms off across the street; it's really cool! (normal voice): and I thought, "You're new here, aren't you?" Since then I've always wanted to try it.