The phrase circulates online as a short Portuguese reaction sound rather than as a widely documented film quote, so its appeal rests on the line itself instead of a famous scene. It is shared in meme edits and short videos where a group is portrayed as acting outside normal human behaviour, and the horse claim gives that exaggeration a single quotable label. Its five-second length, clear speech and instantly understood contrast help it survive as a reusable punchline, especially in Portuguese-language communities where the wording needs no explanation.