Have a look at the video link below of a performance by a stunt pilot who is, in real life, a Delta Airlines pilot. His act at Air Shows is to pretend that he is a drunken spectator who rushes from the stands, 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 enormous stress and has a very powerful engine. Apparently, this is the most dangerous of Air Show acts because of the low altitude at which the pilot performs. This pilot possesses unbelievable skill, which becomes obvious in the attached video.
http://www.franklinairshow.com/Video...2010%20Net.WMV