There was even a song called "Black Superman-Muhammad Ali" by Johnny Wakelin & The Kinshasa Band. The main lyrics were:
At the height of his fame, Muhammad Ali was settling into his plane seat when an air hostess came and gently reminded him to put on his seatbelt.
"Superman don't need no seatbelt", Ali snorted.
"Superman don't need no airplane", the hostess retorted, a winner by knockout.