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The Fifth Down Game was a college football game on October 6, 1990, that included a play that the crew officiating the game permitted to occur in error. That play enabled the Colorado Buffaloes to defeat the Missouri Tigers by scoring a touchdown at the end of the game. The ensuing controversy cast doubt on Colorado's claim to Division I-A's 1990 national championship, which it went on to share with the Georgia Tech Yellow Jackets. It has been called one of the top memorable moments and blunders in college football history.