The sound comes from the Klasky Csupo animated logo, the closing ident for the animation studio behind shows such as Rugrats. Online creators began distorting that short logo sting, slowing it, pitching it and boosting its volume until it became a standalone jumpscare in scary logo videos shared on YouTube. Those remixes spread through meme compilations and short-form edits, where the familiar cartoon ident turning suddenly loud and warped became the joke itself, and it remains a go-to scare for logo parodies and prank videos.