The line comes from Tommy Boy, the 1995 road comedy starring Chris Farley and David Spade as mismatched salesmen. In the scene they hit a deer, load it into their car believing it is dead, and are stunned when it revives and thrashes the interior apart. Clips of Farley's panicked shout later circulated on soundboards and in meme edits, where it became a shorthand reaction for anything unexpectedly coming back to life, from broken gadgets to dormant group chats and long dead jokes.