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.
Have you ever seen the one where he goes to the UN? The tour guide gets pissed. It was hilarious. He was like "Doncha think eetz unfair, like that Jordan gets iz own seat cauze eez like a celebrity."