Michael Keaton is more than an equestrian enthusiast: He has competed in difficult cutting-horse competitions. David Letterman has seen footage of Keaton on ESPN. So when the actor visited the 'Late Show' (weeknights, 11:35PM ET on CBS), the host assumed said video could be shown.

The crew member shook her head. The host remarked, "You don't have it? ... You gotta have it. I can go upstairs to my little room, and I can YouTube the son of a bitch and there it is! I'm so embarrassed, Michael."

Midway through the interview, Letterman was alerted that the crew found the clip. Roll tape. Uh, no. That's a woman.