This clip is mainly known online as a short anime reaction sound rather than as a clearly credited quote. It spreads in meme edits, reaction videos and chat posts because the delivery is brief, recognizable and easy to sync to a surprise moment. Creators keep using it when they want a playful burst of disbelief without needing a long setup. Its staying power comes from how well it fits quick cuts, zooms and exaggerated visual reactions across short-form video.