The 1984 Clemson-South Carolina Game

22 - 21 South Carolina

Carolina took their 9–1 record on the road to Clemson, and fell behind 21–3 to the Tigers. With about three minutes remaining in the game, Gamecock QB Mike Hold led an eight-play 86-yard touchdown drive and, thanks to a Clemson penalty that allowed a re-kick of a missed extra point, defeated the Tigers 22–21 to finish the first 10-win season in program history.

Source: Wikipedia