Parking lot beat down
Have the victim park their car in a normal parking spot. While they are in the place they parked at have another car (the prankster) drive up and swipe the back of the victim's car, leaving huge dents in both cars. Have the prankster wait, hidden, outside for the victim to come out leaving his car parked behind the victims. When the victim comes out he will see his car smashed and the pranksters car sitting behind also smashed up. The prankster will come running out of "the building" and start screaming at the victim for hitting his car. As the victim looks puzzled and starts to argue back that he did nothing the prankster will go into his car and grab a "metal" baseball bat and chase after the victim for "hitting his car". Once the prankster catches up with the victim, he will continuously beat the victim with the onlookers watching. After the victim is scared shitless, he realizes the "metal" bat is actually very soft foam.