It's been 40 years since I saw the movie, but I got to thinking about a scene in American Graffiti that cracks me up every time I think about it. Cop in a '62 Ford patrol car, trying to be sneaky to catch speeders backs into a vacant slot on the front row of a used car lot. Unbeknowst to him, while he is sitting there, a couple of boys crawl under the rear of his car (I think it was some kind of initiation ritual?) and hook a heavy logging chain to the rear end of the cop car and hook the other end to a big lamp post. One of their buddies goes by a little too fast, cop takes off after him. When the slack in the chain runs out, the back end of the car goes up in the air and it tears the rear end and springs out from under the car. Remember that scene? Others in that movie that crack you up?