Originally Posted by Holden Pike
When frippin' Crispin Glover does it...I don't think so.
Back in 1987 and for years afterwards, Crispin tried to diffuse it by saying it was a friend of his on Letterman's show that night and not him at all. That's just plain a lie (if you click on the picture I posted, you'll see a whole series of screencaptures - it's him in a cheap wig).