-Cookie Monster interview ("Kids! Get a cookie, and a pin, and stick it to your chest!" "You TERRIBLE role-model!")
-Stephen lugging his portrait around DC on his back
-the debate SC mediated between Mr. Arty-man and Ed Colbert. ("I DID run for president! Do you even watch this show?!")

Hands down for me is his interview with Cookie Monster. Has to be the best guest ever on the show, then probably Rush