I've been seeing them Muhammad Ali talks UFOs (1973)

Muhammad Ali used a September 7, 1973 appearance on the Tonight Show to discuss his beliefs about UFOs (Unidentified Flying Objects). He had first encountered a UFO while on a training run in 1970. By the time of his death in 2016, Ali had witnessed UFOs 16 different times. He was on the Tonight Show ostensibly to promote his rematch with (at the time) Heavyweight Champion Ken Norton.