The exact origin of this short clip is not clearly documented, and it circulates mainly as a user-shared meme sound rather than as a line tied to a widely identified show or film. Its appeal comes from the contrast between formal politeness and sudden interruption, a combination that works across languages even when listeners do not know the word po. Creators on short-form video platforms reuse it as a quick reaction sound, often for entrances, interruptions, and awkward moments, because its brevity lets it sit neatly over a cut without breaking the pace of a joke.