Dust Sans comes from fan-made reworkings of Undertale, where Sans is reimagined as a far darker, battle-hardened version of the character, and he later became a popular opponent in Friday Night Funkin' mods. Those mods spread through gameplay videos, fan edits and soundboards, where short clips were reused as shorthand for a dangerous showdown. The sound has stayed in circulation because it instantly signals that tone to players who already know both games, even in a clip lasting only a few seconds.