Short vocal reaction clips like this ahhh have circulated on soundboards and in short form edits for years because they need no setup to understand. Creators reuse the same stretched sigh for relief after a close call, mock horror, or an over the top reaction to good news, and the meaning shifts with the image underneath it. Its popularity comes from that flexibility and from how easily it can be cut, looped or timed to a zoom, a freeze frame or a caption in everyday meme editing.