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Leon Lett's premature celebration
Late in the fourth quarter of 1993's Super Bowl XXVII, Dallas Cowboys defensive tackle Leon Lett recovered the Buffalo Bills' fumble. As he headed for the end zone, he slowed down to gloat, sticking the ball out as he neared the goal line. What he didn't see was Don Beebe, who knocked the football out of Lett's hand, costing him the touchdown and causing him endless embarrassment. Fortunately, the play didn't cost Dallas the game (they won 52-17), but it did keep the team from setting the record for most points scored in a Super Bowl.