EE WAS CARRYING A 5 GAL BUCKET UP A FLIGHT OF STAIRS WHEN HE SLIPPED AND A STEP. EE DID NOT FALL BUT CAUGHT HIMSELF. EE FELT PAIN IN HIS LEFT BUTTOCKS. EE WAS SENT TO MD WHERE HE WAS TREATED, GIVEN PAIN MEDICATION AND PLATED ON RESTRICTED DUTY NO PUSHING, PULLING, LIFTING NO PROLONGED STANDING, NO OPERATION OF EQUIPMENT.