The line comes from Super Smash Bros Brawl, released for the Wii in 2008, where Pit from Kid Icarus returns as a playable fighter. It is one of his match opening taunts, meant to signal that combat is starting. Clips of Brawl taunts later circulated on soundboards and in short gaming edits, where their exaggerated delivery works out of context. This shout survived because it is instantly clear, extremely brief, and useful whenever any small confrontation is played up as a major battle.