The Tonight Show Starring Jimmy Fallon2014

Billy Crystal:
[on Robin Williams] We were in Boston - it was 1988; it was, like, the second Comic Relief. And we're at the State Building with Michael Dukakis, who was the Democratic nominee to run against George Bush Sr. Right? And Mr. Dukakis was a very genteel... not a large man, very quiet, professorial-type guy. And, um, very conservative, and - and, uh, we made our speeches and, um, we were funny; Whoopi, Robin and I were, you know, pretty funny. And then Mr. Dukakis said something about Robin being out in the universe - up there, you know, right near Uranus. Well, that's...

Jimmy Fallon:
[buried face in hands, laughing] Oh, no! Does he know who he's playing with?

Billy Crystal:
That's all - that's all he had to hear.

Jimmy Fallon:
Oh, my god!

Billy Crystal:
So, he went off on: "Your anus? My anus! Our anuses! Oh, my god - whose anus is it? Oh, my - " And it - and Dukakis looked at him, and just went,

Billy Crystal:
[deadly serious] "This isn't HBO."

Jimmy Fallon:
...Wow.

Billy Crystal:
[holding hands out as if in caution] So he continued his speech, and Robin stands next to me - and as Dukakis is droning on, Robin says, "No way this mother - - wins."