Beauty and The Beast/Nightmare Fuel

The Disney movie

 * The West Wing, which is much darker and more gothic than the rest of the castle.
 * The Beast's first full appearance, when he confronts and drags away Maurice.
 * The Beast when Belle disobeys him and goes into the West Wing. For the only time in the movie Belle seems to be in danger of actual physical harm from him.
 * The creepy spidery coach-thing that whirrs like an angry insect hive as it transports Maurice back to the village. You never see this thing again during the rest of the film. It makes you wonder where it's hiding.
 * The asylum owner in Beauty and the Beast was WAAAAAAY scarier then even the actual Beast himself.
 * Forte the Organ from the Enchanted Christmas version. His snide grin and black eyes. He was voiced by Tim Curry, aka Pennywise among other things. Anything voiced by that man can qualify for Nightmare Fuel, accidental or otherwise
 * In the stage version, the servants who have been turned into objects are gradually turning into full-fledged inanimate objects. They even comment on a few servants that this has already happened to.
 * Gaston suddenly stabbing the Beast in the side with a huge Slasher Smile on his face even after the Beast spared his life. If you pause the movie when he's falling to his death you can see skulls in his eyes.
 * That's nothing when you take into account the former option for Gaston's death: Apparently, when stabbing The Beast on the roof before falling off, he reacted while falling to his doom in a very similar fashion to Heath Ledger's Joker when Batman threw him off the roof in The Dark Knight.