EE WAS ATTEMPTING TO REMOVE A PUMP SCREW THAT WAS STUCK IN THE PUMP'S HOUSING. HE WAS HITTING THE SCREW SHAFT WITH A 10 LB SLEDGE HAMMER TO DRIVE IT OUT OF THE HOUSING. WHEN HE STRUCK THE SCREW SHAFT WITH THE SLEDGE HE TORE HIS RIGHT BICEP MUSCLE AND LIGAMENT WHERE IT ATTACHES TO HIS SHOULDER.