In the interview with Buzz Aldrin, he asked the former astronaut if he was ever disappointed that "Louis Armstrong" was the first man to walk on the moon instead of Aldrin. LOL.
My favorite Ali G moment was when he interviewed Sam Donaldson and kept asking him about the Waterworld scandal that brought down Nixon.
I'm constantly amazed at the cluelessness of celebrities who go on his show without realizing it's a goof.