Short shouted reaction clips like this spread through soundboards and short form edits because the phrase needs no setup to be understood. The what are you doing line works as a universal callout, so creators reuse it across pranks, fails, pet videos and gaming moments regardless of the original context. Its brief length, just over a second, makes it easy to layer over other audio and loop into memes, which has helped it stay in rotation as a go to reaction for catching someone mid mistake online.