Vad i hela är detta is a common Swedish expression of disbelief, equivalent to asking what on earth something is supposed to be. As a soundboard clip it circulates mainly as a reaction meme, detached from any single known source and reused because the tone is understandable even to listeners who do not speak Swedish. The rising bafflement carries across language barriers, so editors pair it with strange screenshots, cursed images and out of context video moments where a verbal what is this reaction is funnier than explaining the joke.