at my old house some bastards kept giving me lawn jobs, so after about 5 different times i set up a trap with six 2X4's with about 250 long nails nailed all the way through the board. Well sure enough i'm sleeping one night and i hear a loud clunk clunk. Apparentley one of the whole boards got stuck to the tire and whacked the shit out of the side of the car. I never did catch the bastard, but i KNOW he got at least 3 flat tires and a dented side. Needless to say, that was the last lawn job i ever got :)