The call comes from arcade fighting games of the early 1990s, where an announcer counted each round before shouting fight to begin play. In best of three matches the third round was the decider, so round three carried extra weight for players and spectators. Games like Mortal Kombat and Street Fighter helped make the format familiar worldwide. Clips of the announcement later spread through gaming videos, streams and meme edits, where creators borrow the tension of a deciding round for everyday rivalries and rematches online.