The sound comes from Fortnite by Epic Games, the battle royale released in 2017 where knocking an opponent is a core mechanic before they can be revived by a teammate. The cue was designed to be heard clearly in chaotic fights, so players learned it within hours of playing. Clips of gameplay spread across YouTube and TikTok, and editors soon lifted the effect on its own as a meme sound for any kind of knockdown moment, in games or in real life.