Instrgtsm has no widely documented source work or credited creator, and it appears as a user-uploaded entry on a soundboard rather than as a clip tied to a known film, show or song. That kind of short, anonymous clip often spreads through creators reusing it in edits, where its brevity makes it easy to copy, share and drop into new contexts without needing any background knowledge. Its continued use depends on that practical flexibility, not on a famous origin.