Pretty Blood is an online animated series built around Malino, cute animal-like characters placed in violent and disturbing stories, with the bear Rinny as one of its most recognised figures. Fans clipped short effects like this bonk from episodes and shared them on soundboards and in fan edits, where the sound works on its own as a punch sound without needing the scene. Its popularity comes from that contrast between a cute source and a hard hit, making it easy to reuse in memes and reaction videos.