Mileena is a long-running Mortal Kombat fighter, and Mortal Kombat 9, released in 2011, revived the series with classic characters and brutal finishing sequences. Her knockout scream is one of the game's standard defeat sounds, played when a match ends and the losing fighter collapses. As gameplay clips, compilations and soundboards circulated online, short KO sounds like this one became easy shorthand for losing badly. It remains popular because it is instantly recognisable to fighting-game fans and works without any context in short-form edits.