This audio comes from Fortnite, where a knocked player is downed but not fully eliminated in modes with revives. The cue became familiar through gameplay clips, livestream moments and short-form edits built around wins, throws and teammate reactions. Because so many players instantly recognize what a knock means, the sound spread beyond raw Fortnite footage into general gaming memes. It is still popular because it delivers an immediate, readable failure beat without needing any extra context from the editor.