Calcium Carbide...
Used to make calcium carbide "bombs" when I was a kid (just to make noise and fireballs at night). Take a metal paint can and punch a small hole in the bottom. Put a teaspoon full of calcium carbide pieces in the can. Add a tablespoon of water. Hammer on lid quickly and hold finger over the hole on the bottom. When the fizzing sound subsides remove finger and hold lit match or lighter up to hole....BOOM!!!!! It is an epic explosion. Had the metal paint can handle flip up once and the lid ripped the handle off the metal pieces that held it to the can. The lid was almost cut in half..... Man were we stupid kids! Also very lucky. That Calcium Carbide is powerful stuff.
Used to make calcium carbide "bombs" when I was a kid (just to make noise and fireballs at night). Take a metal paint can and punch a small hole in the bottom. Put a teaspoon full of calcium carbide pieces in the can. Add a tablespoon of water. Hammer on lid quickly and hold finger over the hole on the bottom. When the fizzing sound subsides remove finger and hold lit match or lighter up to hole....BOOM!!!!! It is an epic explosion. Had the metal paint can handle flip up once and the lid ripped the handle off the metal pieces that held it to the can. The lid was almost cut in half..... Man were we stupid kids! Also very lucky. That Calcium Carbide is powerful stuff.