The sound comes from Japanese online video culture and is associated with Hikakin, one of Japan's best known YouTubers, whose exaggerated reactions have been clipped widely as Hikakin Mania memes. The Japanese words are simple and easy to recognise even for non speakers, with nande meaning why, so the repeated question travels well outside Japan. Short clips of the moment circulate on soundboards and in edited videos, where the phrase is reused whenever a creator needs an instantly readable reaction of disbelief, confusion or comic protest at an unexpected result.