The line comes from Granblue Fantasy, the long-running Japanese role-playing game, during its collaboration event with Cardcaptor Sakura, in which Sakura appears as a playable character. Fans clipped her brief, startled reaction and shared it as a standalone sound, where its short length and instantly readable confusion helped it travel beyond the game itself. It remains popular because it works without context: even viewers who have never played Granblue Fantasy can hear the surprise in her voice and use it as a quick, lighthearted reaction in anime edits and short videos.