I recall a story going around once about the boxer Mohammad Ali on a flight. Whether true or not it made a good story.

The plane was hitting a little turbulance so the pilot put on the seatbelt sign and the stewardess walked the aisle checking for compliance. Finding Ali with no seatbelt he was reminded of the pilot's request. He simply replied,"Superman don't need no seatbealt." Without missing a beat the stewardess replied,"Superman don't need no airplaine either."

Ali smiled and clicked his seatbelt...