http://www.youtube.com/watch?feature=player_detailpage&v=Hphm6a24eMU Very Good Interview from 10 years ago <S>
He mentions getting into a spin once that he couldn't get out of.Here's footage of P-39 spin and tumble tests, the last one in the series being one the pilot couldn't get out of and had to bail out:https://www.youtube.com/watch?v=BWwI6gZw67g