Etching Solution Bomb Ingredients: * 2 liter bottle * aluminum foil * etching solution (available at most Radio Shack stores used for etching electronic panels) Procedure: * Take an empty 2 Liter bottle, plastic preferably. You may use glass if you have big balls and fast legs! * Tear a bunch of aluminum foil into tiny little balls and fill the 2liter just at the base where the hard plastic cover is. * Take the solution and pour about 3 oz or enough to just make an even mixture. (pour fast though) * Place the cap on and shake just twice really fast...put the bottle down and run like hell. You get a nice loud explosion and a nasty yellow mess that is really hard to clean up espically on glass! WARNING: Do not get the solution on your clothes or skin. It's a lot like HCL but reacts more violently with aluminum. This recipe courtesy of the Black Ninja