"Here's a knocking indeed! If a man were porter of Hell Gate,
he should have old turning the key. [Knock] Knock, knock,
knock! Who's there, i' th' name of Belzebub? . . . [Knock] Knock,
knock! Who's there, in th' other devil's name?"

The original Knock Knock joke hahaha
Macbeth Act 2, scene 3, 1–8

Shoot requested by  Morphine