Buzina susto is not tied to one film, show or song, but to the wider online habit of using a car horn as a sudden scare. Its Portuguese wording suggests a horn meant to startle listeners, and it appears in prank and comedy clips, where a loud horn replaces a scream or a dramatic sting. Because the clip is only about half a second long, it fits into short videos, reaction edits and soundboards, and creators keep returning to it for the same reason: a horn is instantly recognisable, hard to ignore and funny when it arrives out of nowhere.