EE WAS ASSISTING ANOTHER EE INSTALL A TROUGHING ROLLER. WHILE DOING SO EE PINCHED HIS SECOND FINGER ON HIS RIGHT HAND BETWEEN TWO ROLLERS. AT THAT TIME EE LOST CONCIOUSNESS FOR APPROX 30 TO 45 SECONDS. EE SUSTAINED A BRUISE TO BACK OF HIS HEAD AND WAS TRANSPORTED TO HOSPITAL. EE WAS RELEASED AFTER BRIEF OBSERVATION ADN RETURNED TO WORK THE NEXT DAY AS SCHEDULED.