Fortnite, Epic Games' battle royale released in 2017, uses a knockdown system where damaged players fall before they are eliminated, and the short knock sound marks that in-between state. As gameplay clips and streamer highlights spread on YouTube, Twitch and TikTok, viewers began to recognise the tap even outside a full match. Editors lifted the one-second clip for memes and reaction videos because it instantly signals a takedown without dialogue. Its brevity and familiarity keep it popular for fast edits where a longer sound would slow the joke.