A man is sitting at home watching TV when he hears a knock at the door. Begrudgingly, he hits pause on the remote and makes his way to the door. Once at the door, he hears a woman's voice from outside.

Woman: Knock knock!

Man: Who's there?

Woman: Cliffhanger.

Man: Cliffhanger who?

The man stood at the door for hours, anxiously awaiting a response, but there was none.