The rhyme comes from the 1984 horror film A Nightmare on Elm Street, where it is linked to Freddy Krueger, the burned killer who attacks teenagers in their dreams. Sung by children in the film, it turned a familiar counting rhyme into a warning signal for his arrival. The chant returned across sequels and remakes, entered Halloween playlists and horror references, and later spread through memes and short-form videos. It endures because listeners recognise it instantly, even without seeing Freddy, as shorthand for approaching danger.