The Rocky Horror Picture Show/Nightmare Fuel


 * At first Dr. Frank N Furter is rather eccentric, but not too scary. Then, he becomes absolutely terrifying when he hacks Eddie to pieces with a pick axe.
 * And then later on Frank serves Eddie up for dinner.
 * A slightly more subtle example involving Frank is that he's more than willing to turn two innocent humans, his own creation, and his groupie into mindless sex-slaves and force them to perform a stage show against their own will.
 * Frank's final song "I'm Going Home", with the sudden appearance of a crowded audience cheering him on as he tearfully absorbs all the attention they're giving him. Then the song ends,