The Great Mouse Detective/Nightmare Fuel


 * Ratigan during the final confrontation in the clock tower. His clothes are torn, he's given up all pretenses at civility, and at several moments is scurrying about like a real rat. And it is terrifying.
 * And it's pretty scary when he lunges towards Basil when Basil is trying to get Olivia to Flaversham. It almost seems like he's lunging at the audience rather than Basil!
 * The beginning where Olivia and her father are having a nice moment, when someone tries to break down the door to get inside the store. Then the father hides Olivia in a cupboard and Fidget comes and we see the silhouette of Fidget beating up Olivia's father!