John Williams composed the two-note motif for Steven Spielberg's Jaws in 1975, using a simple low E and F pattern to suggest a shark moving unseen beneath the water. Because the theme works without any picture, it quickly escaped the film and became a cultural signal for approaching danger in television, comedy and online video. Short edits like this one trim the build to just a few seconds, making it easy to drop into memes, reaction clips and pranks where the joke lands on the sudden reveal.