Composed by John Williams for Steven Spielberg's Jaws in 1975, the main theme is famously just two notes, E and F, played on tuba to represent the shark itself. Williams won an Academy Award for the score, and the motif became shorthand in film and television for unseen danger approaching. Online it lives on as an instant suspense cue, reused in parodies, trailers, and edits whenever something ordinary needs to feel like a predator closing in.