Fortnite, Epic Games' free battle royale game launched in 2017, uses a knock system where a downed player can still be revived by teammates before elimination, and this short sound marks that moment in matches. As Fortnite clips spread across YouTube, TikTok and Twitch, editors began lifting the knock for montages, fails and reaction videos, where it worked even for viewers who did not play the game. Its popularity on soundboards followed that same pattern, because the sound instantly signals defeat in a way that needs no context, keeping it in regular use years after its introduction.