Buying a plane and getting a license is the first step towards winning the Red Bull Air Race at some point. Listening to the US Army's how to video from 1942 on airplane acrobatics is the second.
Loops, rolls, spins. Mastering them sound easy enough given the space up there, but back in the early forties, there were no computers to help you keeping things tidy. In fact, British Spitfires used to stall while being upside down. That's carburetors for you.