dry ice bomb 

So here's what ya do. Buy some dry ice (wherever possible.) Then either find or get an empty PLASTIC bottle with the cap still there and intact. Then pour water into the bottle (the more you put in the less time you have to run), put cubes of ice in (the more you put in the less time you have and the larger the explosion), twist on cap TIGHTLY and throw immediately. Can work in any time frame from 30 sec. to 2 min., and is incredibly loud. The reason you must do it in a plastic bottle is so that glass shrapnel doesn't go anywhere and kill people.
Here's how it works:
Dry ice is so cold that it goes from a solid to a gas, skipping the liquid phase. Since gas is less dense, it will expand ALOT and will eventually explode. I have never tried it without water, but it probably would either take to long or not work

Instead of lighting off fireworks and possibly blowing your hand off, use a dry ice bomb instead.

dry ice bomb by Wengel June 29, 2006

dry-ice bomb 

Bomb made by using dry ice , hot water, and or one of the following

8oz. bottle
12 oz. bottle
1,2, and 3 liter bottles
Must be soda bottles water bottles will not work right

Q: What should we do to scare the neighbors?
A: Dry-Ice Bomb

dry-ice bomb by Masta Dragon Red July 11, 2004