I read a good story about 'how to send a car to hell' in a certain cook book; take a can of shaving foam, freeze it, then pierce it a few times and chuck it into someones car (through a slightly open window or someroof). When it starts to warm up and thaw out, the foam will will expand out of the can, and it ends up looking like that police car in Demolition Man when Stalone crashes it...