The line comes from The Lord of the Rings: The Fellowship of the Ring from 2001, where a Nazgul, one of Sauron's Ringwraiths, is hunting for Frodo Baggins and traces him back to the Shire. Its drawn-out hiss made the moment easy to quote, parody and isolate as a standalone clip. As Lord of the Rings scenes circulated in edits, reaction videos and soundboards, the whisper became shorthand for a predator closing in on its target, and it remains popular for that mix of genuine menace and absurd over-seriousness.