AFTER CHOKE UP OF A SCREW CONVEYOR, EE WAS SUMMONED TO TROUBLE SHOOT AND HELP WITH REPAIRS. BREAKER HEATER WAS KICED OUT SO EE INSTRUCTED OPERATOR TO RESET AND TRY SCREW AGAIN. MOTOR SWITCH WA S TURNED OFF BY OPERATOR. EE SWITCHED MOTOR SWITCHE BACK ON AND WAS STANDING CLOSE TO SEE IF BELTS WERE SLIPPING. WHEN OPERATOR TURNED ON BREAKER, MOTOR AND FRAMEWORK STRUCK EE ON FACE, NECK,