Hello Zepp was composed by Charlie Clouser for the 2004 horror film Saw, directed by James Wan. The cue accompanies the closing twist in the first film and returned in different arrangements across the sequels whenever Jigsaw's plan was explained. Clouser named the piece after a cassette greeting heard in the story. As clips of the endings circulated online, editors detached the music from the films and began using it for any unexpected revelation, and it remains a shorthand for a carefully planned twist.