Marge Simpson in 'Screaming Yellow Honkers' - S10-E15
Superintendent Chalmers: Well Seymour, it seems we've put together a baseball team, and I was wondering who's on first.
Principal Skinner: Yes, not the pronoun, rather a player with the unlikely name of "Who" is on first.
Superintendent Chalmers: Well that's just great Seymour, we've been out here six seconds, you've already managed to blow the routine!
Answer: Willy referred to an encounter he believed he had with actual aliens, while Wiggum thought he was referring to the arcade game.