Police airhorn sounds have become a staple of online prank and meme culture because they borrow the urgency of a real emergency signal and turn it into a joke. On soundboards and short video platforms, the single blast is easy to drop over almost any clip, from staged traffic stops to surprise scares, without needing dialogue or context. Its popularity has lasted because the effect is instantly recognisable, even to viewers who have never heard it before, and because a loud interruption works in almost any language. That simple, universal shock value keeps it in regular use by prank creators.