This track comes from the fan-made Undertale Time Paradox soundtrack by Doopix, an original score inspired by the world and characters of Undertale, including Sans. Rather than a clip from the official game, it belongs to a community-created project that reimagines the story with its own dramatic music. Fans have shared short excerpts like this one on soundboards and in video edits, where its tense, cinematic feel fits battle scenes and emotional moments. That combination of familiar Undertale style and original composition is why creators keep returning to it.