Dry Ice Bombs are pretty dangerous. I had one blow up in my hand once. It feels like a firecracker exploding in your hand, except it is much worse. I could not feel my hand for about 10 minutes. It was weird. I thought I broke some fingers, but I did not. Then, this one time, my friend picked one up, but he waited too long, and it blew up in his hand. I think he broke his thumb. We blew up a pumpkin with a dry ice bomb. That was cool. One time we blew up one of those big 32oz. SPRITE plastic bottles, and the plastic blew up and around the bottle. Basicaly the explosion turned the bottle inside out.
Lately my friends and I have been experimenting with a Dry Ice Bomb Cannon. We have been shooting potatoes and tennis balls with it. But we have not found anything strong enough to withstand the explosion of the bottle inside the tube. We used PBC pipe, but the pipe explodes. We literally blew up PBC pipe with the Dry Ice Bomb. We are thinking about trying either metal tubing or wider PBC pipes. Any suggestions will be greatly appreciated.
Do not mess around with Dry Ice Bombs, unless you know what you are doing. As always use SAFETY and CAUTION FIRST. BE CAREFUL.
Read this:
http://en.wikipedia.org/wiki/Dry_ice_bombs 
