YMMV / The Simpsons S 21 E 4 Treehouse Of Horror XX
Nightmare Fuel: Being a Treehouse of Horror episode, there's bound to be moments of this, such as Muncher Krusty attacking the camera and the scene of Homer impaled on the distiller.
Nightmare Retardant: "Moe Business" doesn't even try to hide the fact that it's just a musical theatre performance, so it comes off as a bit more humorous than the other segments.
Squick: The burgers that start off the Muncher apocalypse are made from beef that is given to other cows and then repurposed into the burgers. Becomes more of Squick when it's referred to as the "Mad Cow" burger.
Homer on the distiller, especially when he's wrinkly from being drained of blood