What's a good revenge??? (car got keyed)

what about putting gum in his keyholes? its an old one but works, or try taking a bunch of things from the fridge that are ready to be trashed like: old milk, mayo, salad dressing,yoguart, icecream, and anything else that you can think of , then put it in a glass jar, let it sit in the sun for 2 days, then using a funnel, pour it into some balloons, then bombs away. the next day drive by and watch him puke his guts up as he tries to wash it off. it is really funny