Soda Bottle Bomb
Take a 2 liter plastic soda bottle and fill about a quarter of it with Muramic Acid (pool acid).
After this you have to work fast! Drop some aluminum foil strips into the bottle and put the cap on.
Shake it up a bit and throw it. It will create a gas and explode. The fumes are very hazardous,
so make sure you wont harm anyone unless you intend to.