EE WAS PUSHING NEW SCREENS UP THE SUPPORT RAILS TO THEIR PROPER POSITION ON THE SCREEN. THE RAILS ARE COVERED WITH RUBBER TO PREVENT THE METAL FROM WEARING OUT. GIVEN THE EE'S BODY POSITION A ND THE REQUIRED RESISTANCE AND FORCE, THE EE SUFFERED A STRAIN TO HIS GROIN. EE IS PROJECTED TO RETURN TO FULL DUTY ON 12-23-03.