[Malibu1]

When I was in grade school......I had friends that would sneak out at night.....They would take fishing line about 100 feet long and string the fishing line through the arms of a T-shirt. One person on each side of the road hiding behind things holding the fishing line with the T-shirt sitting bunched up in the road. When cars would get close to the T-shirt, they would each pull on the line and the T-Shirt would jump up in the air. In the dark it really did look like a person just jumped up in front of a speeding car. Cars would slam on brakes, head for side of road and stuff. They stopped doing it after one of them got ruffed up by a driver who had it happen to him more than once.
Not sure where they had got the idea to do that prank but they got lucky that nobody was ever hurt.