The line is spoken by Thanos, played by Josh Brolin, in Marvel's Avengers: Infinity War from 2018, during a tense confrontation early in the film where his patience is clearly wearing thin. Clips of Thanos were widely shared after the film's release as his calm threats became shorthand for power online. This short warning was lifted onto soundboards and into short form edits because it works without context, letting creators turn an ordinary insult or boast into a moment that sounds like it is about to have serious consequences.