Julio, the Victim of the Week in "Meet Juan Doe", doing the Macarena in Raines' car. To quote Raines: "This is my life. Watching a hallucination do the Macarena. It doesn't get any better than that."
Raines finding out who the guy he was looking for was... by wiggling his ears. Doubles as a funny cast showoff. That was not a trick or something - Jeff Goldblum can actually wiggle his ears like that.