EMPLOYEE STATED HE WAS WATERING THE ACESS ROAD FROM THE TOP OF THE MOUNTAIN TO THE TURN AT BANNER AND CANDICE COAL MINES. WHILE HE WAS TURNING THE WATER TRUCK AROUND TO RETURN TO THE TOP OF TH E MOUNTAIN, THE STEERING WHEEL KICKED BACK CATCHING HIS LEFT THUMB AND WRIST AREA IN THE SPOKE AREA OF THE STEERING WHEEL.