This clip is best known online as a French reaction sound shared on soundboards, meme pages and short-form edits rather than for a widely agreed mainstream source. Its popularity comes from how fast it communicates disbelief at a number, price or amount. That makes it a natural fit alongside other one-tap reactions such as the Instant Button style of punchy interrupt audio. The sound still gets reused because it is under a second long, language-recognizable and easy to drop into captions, gaming clips and price jokes.