The thing I find funniest is when you get two crackpots in a room who believe different things. Get one to say what he believes and the other (and everyone else in the room) will be stifling laughter wondering *how* a sane person could believe something founded on absolutely no facts or physical realities. Then you get the other crackpot to say what *he* thinks and he'll tell you with a straight face something which also has no foundation in reality, then he'll be genuinely perplexed when you don't believe him.