Cremallera is simply the Spanish word for zipper, and this clip is used online as a generic, language-neutral zipper effect rather than a quote from a film, show or song. Short zipper noises have long been a staple of Foley work, where everyday actions are recreated with props, and they translate easily to phone videos, memes and edits because almost everyone recognises the sound instantly. Its brevity also makes it easy to drop into transitions, outfit changes and packing montages without overpowering the rest of the audio.