The sound comes from the world of Mortal Kombat, the fighting game series famous for its Finish Him prompt and brutal fatality finishing moves that end a match in spectacular fashion. As gameplay clips, montages and reaction videos spread online, the short scream became shorthand for an exaggerated, final defeat, even for viewers who had never played the game. It remains popular because it is instantly recognisable, lasts less than a second and turns any loss, fail or knockout into a punchline without needing explanation.