Post your best automotive related prank

down in the park
I put wooden blocks under the front wishbone of a co-workers fwd car. Just enough so the tyre didn't touch the ground anymore. It had been snowing aswell. When he tried to go home I called everyone at work over to watch and sure enough his car didn't move. He was revving the tits off it trying to get off "the icy patch"and we were rolling on the floor laughing.