WHILE OPERATING A COAL HAUL TRUCK, EE HIT A BUMP IN THE ROAD WHICH JARRED HIS LOWER BACK. AFTER REVIEWING THE CHIROPRACTIC DIAG. & EE'S PERSONAL TESTIMONY, WE BELIEVE EE HAD A PRE-EXISTING ILLNESS & THIS JARRING ACTION AGGRAVATED HIS PREV. BACK CONDITION. EE WAS DIAG. AS HAVING DISC DEG. IN 2002 WHICH HAS CONTINUOUSLY CAUSED BACK PAIN - TAKEN MEDS. & RECD. CHIRO. TREATMENTS.