The tune comes from Super Mario Bros, the 1985 Nintendo platform game in which Mario must run, jump, and avoid enemies to reach the end of each level. When Mario is hit or falls, this short descending melody signals that a life has been lost. As gameplay videos, speedruns, and reaction clips spread online, the sound moved beyond the game itself and became shorthand for failure in short-form video. Its familiarity, brevity, and instant comic timing keep it in regular use decades after the original release.