Sometimes, greatness catches you unawares. Sometimes, you hit your peak, and you have no idea what has happened.
Sometimes, this happens to you, and you have precious little to do with it.
This happened to David Letterman on July 28, 1987. It caught him unawares.
Hell, at the time, most of us in the viewing audience were with Dave. We just figured Crispin Glover was stoned out of his gourd. And weird.
A stoned weirdo.
After watching Andy Kaufman for years by then, we should have recognized greatness.
But now we know the deal.