Me and a few mates were smoking some pretty strong stuff.
One of my mates was sitting on top of a small wall, complaining that it wasn't affecting him. All of a sudden he just leant back and disappeared.
Although the wall on our sde was only about 4 ft high, the other side had a 15 ft drop. He fractured his skull but was laughing his head off.
Not as much as the rest of us laughed though