Clown Without Pity (Season 4, “Treehouse of Horror III”)
A Krusty the Clown doll becoming evil and then trying to kill Homer is both actually a bit scary, especially as a younger viewer, and also a very funny setup for a short Halloween segment. However, most people remember this episode for a very different reason: the bit between Homer and a mysterious salesman who sells forbidden objects from places men fear to tread, and also offers frozen yogurt. (He calls it “frogurt.”)
