ON THE ABOVE DATE, EE, A ROCK TRUCK DRIVERS, WAS PERFORMING A PRESHIFT EXAM ON A ROCK TRUCK THAT HE WAS PREPARING TO OPERATE. SHORTLY THEREAFTER, HE WAS OBSERVED BY A COWORKER COLLAPSED OVER T HE STEERING WHEEL OF THE TRUCK. CPR WAS INITIATED & CONTINUED BY EMTS UNTIL HE ARRIVED AT THE HOSPITAL WHERE HE WAS PRONOUNCED DEAD. CAUSE OF DEATH WAS LISTED ACUTE CARDIOPULMONARY ARREST.