This is from one of the funniest Supernatural episodes when Sam and Dean have themselves committed and to avoid being caught in their investigation, Dean drops his pants, raises his hands and yells out "Pudding!" Makes me laugh every time I see the episode.
Let's not forget A Very Supernatural Christmas, Jump the Shark, and Mannequin 3: The Reckoning. There are so many episode titles that are a play on words for real movies and TV shows. Yet one more reason I love this show.