ON 5-10-2002 EE KNEELED DOWN TO PICK UP A FLIGHT. WHEN HE RAISED UP WITH THE FLIGHT HE HAD A SHARP PAIN IN HIS BACK. 6-24-2002 EE STATES HE AGGRAVATED HIS BACK USING COMEALONG WHEN HE TRIED T O HELP METAL OVER HANDRAIL. 6-27-2002 EE BEGAN MISSING WORK.