Told by Don Criqui on NBC morning news:
After telling of Jose Canseco's recent run-in with an airline stewardess over not wanting to wear a seatbelt...
"Once when Muhammed Ali was flying, the stewardess came over and asked him to fasten his seatbelt. Ali told the stewardess, "Superman don't need no seatbelt."
The stewardess replied, "Champ, Superman don't need no plane."