The waterphone has long been a favourite tool of film sound designers for creating unearthly, suspenseful atmospheres, and its distinctive bowed-metal sound is instantly recognisable from horror and thriller soundtracks. Online, the instrument found a second life as a standalone sound effect, shared by editors who needed a quick way to signal dread without dialogue or music. It is now a staple in horror edits, true crime narration and Halloween content, where a few seconds of its wavering tone are enough to tell viewers that something is about to go wrong.