4 clips of Homer injuring himself play when they talk about Homer getting addicted to painkillers, this is one of the episodes the clips are taken from.
When Homer & Bart think they have leprosy and try to get into the Flanders' house, they start clawing through the letter box and shouting "Brains!" because the "leprosy" makes them look like zombies. The scene is also filmed much like the 3rd act of this movie.
A clip of the Batman Beyond Batsuit is shown focusing on the rear end and Batman saying, "Feels like I'm wearing nothing at all... nothing at all... nothing at all," parodying Ned in his skisuit when Homer tries to remember what the ski instructor said.