Kayako Saeki is the vengeful ghost at the center of the Japanese Ju-On films and the American remake The Grudge from 2004. Her signature sound is a death rattle croak, created for a character whose broken neck prevents normal speech in the story. Clips of that croak have circulated for years in horror compilations and prank videos. Short remixed versions later spread on TikTok, where creators detached the sound from the films and used it as a reusable scare cue for edits, reactions, and haunted house jokes.