EMPLOYEE WAS IN HIS LOADER, LOADING ROCKS ON TRUCKS WHEN HIS CHEST STARTED HURTING. HE BEGAN SWEATING PROFUSELY, BREATHING RAPIDLY. HE SLUMPED OVER STEERING WHEEL. WHEN WITNESS SAW HIM HE WAS HOLDING HIS CHEST WITH HIS RIGHT HAND, LEFT ARM HANGING DOWN SHAKING, HEAD SHAKING, TEARS COMING OUT OF HIS EYES.