The Fatality sound comes from the Mortal Kombat game series, where the announcer calls out the finishing move after a match-ending victory. It became one of the franchise’s most recognizable audio cues and spread far beyond fighting games through YouTube edits, meme videos, and short-form clips. People still use it because the line is instantly understood as a dramatic finish, especially when paired with a knockout, a devastating comeback, or a comedic overreaction.