EE WAS ASSISTING WITH A BLOCK @ THE PRIMARY CRUSHER WHEN THE ACCIDENT OCCURRED. THE INJURY HAPPENED AS EE PICKED UP A ROCK WEIGHING APPROX 100 POUNDS. AS HE LAID THE ROCK DOWN HIS FOOTING COUL D HAVE SLIPPED CAUSING THE ROCK TO LAND ON HIS LEFT HAND EE WAS UTILIZING PROTECTIVE EQUIP (GLOVES) TO PROTECT HIS HANDS.