Teeth chattering has long been used in cartoons and comedy as a visual shorthand for cold and fear, and the sound version became a staple of online soundboards and meme edits. Instead of showing long shivering scenes, creators drop in a few seconds of exaggerated clattering to make the reaction clear instantly. The fast, loud version is especially popular because it cuts through music and dialogue, works without context, and pairs well with frozen expressions, shaking characters and over the top scared faces in short videos.