EE WAS TAKING A LOAD OF MATERIAL TO OUR HOPPER IN HIS HAUL TRUCK. HE SNEEZED & JERKED HIS WHEEL, IN DOING SO HE RAN OVER ONE OF OUR CONCRETE BLOCKS THAT WE HAVE LINED ALONG OUR HAUL ROAD. WH EN HE RAN OVER IT, HE SLAMMED HIS HEAD IN THE INSIDE OF THE CAB, OF THE HAUL UNITS WINDOW LATCH CAUSING A CONCUSION.