EMPLOYEE WAS MANUALLY DIGGING/CLEANING PUG MILL HOPPER FEED WITH A SHOVEL. APPARENTLY, SUFFERED A HEAT STROKE WHEN HE STOPPED TO GET A DRINK OF WATER. ACCORDING TO THE SUPERVISOR, THE EMPLOYEE SUDDENLY LOST CONTROL OF BODILY FUNCTIONS AND MUSCLE CONTROL. THE EMPLOYEE ENDURED VIOLENT SIEZURES/MUSCLE CONTRACTIONS WHILE ON ROUTE TO THE HOSPITAL.HE LOST CONSCIOUSNESS AS WELL.