Nightmare Face

Films - Animation

 * The face Jack Skellington makes from The Nightmare Before Christmas when he threatens Lock, Shock, and Barrel.
 * "...and they call him Sandy Claaaawwwwwzzzzz!!!!!"

Web Animation

 * Hazbin Hotel: Alastor has an especially terrifying one with black sclera, glowing red irises, pupils like radio dials, and a fanged Slasher Smile while static and demonic sigils pop up around him. The Freeze-Frame Bonus glitch when he pulls this face shows an even more frightening one where his pupils disappear, his irises turn to glowing pinpoints and blood is oozing from his mouth. Charlie also pulls one during her musical number, with a fanged Slasher Smile, red eyes, and large devil horns bursting out of her head.

Western Animation

 * Breadwinners has a particularly unsettling Gross-Up Close-Up of Buhdeuce's face in "Stank Breath". It's... really not worth looking up if you have a weak stomach.
 * Steven Universe: In "Message Received", Yellow Diamond gives Peridot one (that doubles as hilarious) when the latter calls the former a CLOD.