There is no single famous film or viral clip tied to this short oh, which is part of why it travels so well online. Generic reaction sounds like this are collected on soundboards and reused across short-form video, where a familiar human gasp instantly signals surprise without needing context. Editors reach for it because it is instantly readable, easy to drop into a cut, and works across pranks, gaming clips, fails and everyday reactions, so it keeps appearing even as trends change.