Fred Willard, who's most famous for being 'that one guy' in several movies including Best of Show, A Mighty Wind, Wall-E and several TV projects and commercials, apparently pulled a 'pee-wee' and was arrested on 'engaging in a lewd act' during an adult film in Hollywood.

He was arrested, then released (from the police station, that is). I'm sure we'll hear more as Fred Willard is the type to do whatever he can to stay in the public eye.
I think he's one of the funniest guys in vocal improv, when given the opportunity as he does in any of Christopher Guests film. Who knows, maybe he was auditioning for a new movie?

Watch Fred Willard in Best of Show