In the moment, it looked like another clueless mistake by South Carolina. Surely it would come back to haunt them. But they can just laugh about it now. Locked into a scoreless game in the third inning, Ethan Petry crushed a three-run homer into the visitors bullpen. Or so he thought. As he rounded first on his home run trot, Austin Brinling had retreated back to closer first base thinking the ball might stay in the yard. So Petry, fired up and not looking, accidentally passed Brinling. So instead of a three-run shot, it became a two-run single that cleared the bases. Miscues like these have a…