These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Simpsons S 10 E 4 Treehouse Of Horror IX
Nightmare Fuel: During "The Terror of Tiny Toon", Bart is reduced to a skeleton by a stream of piranha coming out of a fire hose.
One-Scene Wonder: Krusty appearing in vampire getup to host the Itchy and Scratchy segment of "The Terror of Tiny Toon". Reached Ensemble Darkhorse status considering how that incarnation of Krusty became a Burger King Halloween toy and appeared in some Treehouse of Horror merchandise and imagery, despite not really playing a role in the segment.
Ugly Cute: Maggie when she transforms into an alien.