The sound comes from Tobias and the Arcane Merchant by creator Tines Sensahthe, where Tobias is a central character and Oliver is the person he calls for in this moment. The isolated scream was clipped from the work and shared on soundboards as a standalone reaction. Its popularity online comes from how clearly the name carries even without context, making it reusable far beyond the original scene. Fans of the series and meme editors alike keep using it for callouts where one intense shout says everything.