The sound refers to The Human Centipede, a 2009 Dutch horror film directed by Tom Six that became infamous for its extreme surgical premise involving a surgeon who connects three people together. Despite limited mainstream success, the film developed a strong cult reputation online, where its title alone became shorthand for something deeply gross. Short recap clips like this twelve second version spread through meme and soundboard culture because they turn a taboo movie into a quick, shareable joke that almost anyone instantly understands, even without seeing the film.