The line comes from Lars von Trier's 2009 psychological horror film Antichrist, where a wounded, talking fox looks at the camera and croaks chaos reigns in a distorted voice. The bizarre scene was widely shared and parodied online because it feels both deeply unsettling and unintentionally comic. Over time the audio was clipped from the film and reused far beyond horror circles, becoming shorthand on forums, videos and soundboards for anarchy, messy fandom moments and any plan falling apart in spectacular fashion.