The screech comes from Emperor Palpatine, also known as Darth Sidious, in Star Wars: Episode III – Revenge of the Sith from 2005, during his lightsaber duel with Jedi Master Mace Windu. As the fight turns against him, Palpatine lets out the distorted, high-pitched cry that fans later clipped and shared as a standalone sound. It spread through Star Wars fan edits, reaction videos and meme soundboards, where its exaggerated villainy made it instantly recognisable. It remains popular because it needs no context: one shriek immediately signals rage, betrayal or a dramatic turn.