The sound comes from Radal, a YouTuber whose distinctive ıhıhıhı laugh was clipped and shared online as a short reaction sound. Once separated from its original video, it spread through meme edits, short-form videos and soundboards, where creators reuse it to signal amusement without adding dialogue. Its brevity makes it easy to drop into almost any funny moment, and like the baby laughing meme, it works because the laugh is instantly understood. That simple, repeatable humour is why it keeps appearing in new edits.