The line comes from Fist of the North Star, the 1980s manga and anime following Kenshiro, whose pressure-point strikes kill opponents after they are hit. In the scene, Kenshiro tells his enemy he is already dead, and the enemy responds with a stunned 'Nani' before realising his fate. Clips of the exchange spread through anime edits, reaction videos and memes, where the two lines became shorthand for an instant, unavoidable defeat. It endures alongside other dramatic anime meme sounds such as Za Warudo and To Be Continued, because the setup and punchline are complete in just a few seconds.