The phrase comes from everyday Dutch, where wat dat kan niet is an informal way of saying what, that cannot be, and the existing caption adds dat kan nie vriend, that cannot be, friend. Clips like this spread through meme sound culture because the language barrier does not matter, the shocked tone translates instantly. It sits alongside short disbelief reactions used in gaming, sports and fail compilations, and it remains popular as a quick audio punchline when words in English would feel too flat or expected for the moment.