No single film, show, or viral post is documented as the source for this short clip, and its appeal comes instead from how easily the two names travel online. Portuguese-language creators and viewers have turned the pairing of Tia Lúcia and Tio Gustavo into a shorthand for a familiar aunt-and-uncle duo, reusing the sound whenever that dynamic appears in a video, meme, or reaction. Because the clip is only a few seconds long, it fits naturally into edits, chat messages, and short-form posts, keeping the reference recognisable without needing any explanation for people who already know the joke.