The Gamecocks were up 14-10 and favored by 2.5 or 3 points in most sports books. They had a 4th and 12 with four seconds left in the game, and the ball at their nine. Instead of attempting a play, or kneeling down (the clock would have stopped and the ball would have been turned over on downs), they did the smart thing and had their quarterback run backwards until the four seconds ran off the clock.
Time expired on the final play, but the intentional safety counted in the final score. South Carolina ended up winning 14-12, screwing anyone who had the Gamecocks giving the points. It was the probably the smartest play for South Carolina, even if it hurt gamblers. Covers.com says 69% of bettors had the Gamecocks laying the points, so the move hurt a lot more people than it helped. And once again, Steve Spurrier is making many more enemies than he did in his press conference earlier in the week.
Thanks to The Wiz of Odds for the heads up