Kamen Rider Ex-Aid is a Japanese tokusatsu series built around video games, in which doctors transform into riders to battle game-inspired monsters. Because defeat in its world is framed as a game ending, the game-over cue became a natural shorthand for failure among fans. Clips and soundboards later carried it beyond the show, where gamers and editors began using it as a quick, recognisable signal that an attempt had ended badly. Its short length and clear arcade reference keep it useful for modern fail edits, even for viewers who have never watched the series.