Power off effects belong to a long tradition of electronic interface sounds used in films, games and cartoons to show technology stopping. This short version spread through online soundboards and meme editing because it is instantly readable and needs no explanation. Creators drop it over everything from a lights-out cut to a brain switching off after a confusing question. Its popularity comes from timing: under two seconds long, clean, and final enough to work as a punchline on its own without extra music or dialogue underneath it.