Good for you, you didnt act on impulse. I would have let all the air out of the tires via the side walls, but the oil drain will work maybe he will blow the engine and not be able to afford another car for a while.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe