Aerosol bomb

All you need is an aerosol can with a flammablesubstance in it, like deoderant, and some strong tape (masking, duct).Just put some tape over the thing so the button is held down and it'scaught spraying, but not hitting the tape. Basically, just get the thing tospray continuously. Now light the jet of aerosol. It will make the classicflamethrower, but as pressure from the can decreases, the flame will drawever closer to the hole in the button. Once it gets an inch or so in thehole, the whole thing blows. This can take seconds to minutes, depending on how full and how big the can is.