The clip comes from a French courtroom style video shared on YouTube, where the flat han han ouais delivery was isolated because it sounded funnier out of context than in the original exchange. French speaking users began reposting the less than one second snippet as a reaction sound, and it spread through meme edits and soundboards as a shorthand for fake agreement. Its appeal is its brevity and unmistakable tone, which needs no translation to be understood as sarcastic, and it remains a niche favourite in French meme communities.