This is a video of a stunt pilot who, in real life, is a Delta Airlines pilot. His act at air shows is to pretend that he is a drunken spectator, who rushes from the stands and jumps into a Piper Cub and takes off without any understanding of how to fly a plane. The Piper Cub is actually specifically built to withstand an enormous amount of stress and has a very powerful engine. This type of stunt is actually the most dangerous of air show acts, because of the low altitude at which the pilot performs.