EE WAS DRIVING A HAUL TRUCK AND RETURNING TO THE SHOVEL IN THE CRESSON PIT LAYBACK WHEN HE HIT A BUMP IN THE PIT FLOOR THAT FLUNG HIM TO THE CEILING OF THE CAB. THE TOP OF HIS HEAD STRUCK THE DOME LIGHT. EE SUFFERED A LACERATION TO HIS SCALP THAT REQUIRED 6 STITCHES TO CLOSE. PLASTIC COVER ON THE DOME LIGHT WAS BROKEN. UNCLEAR ON WHETHER OR NOT HE WAS WEARING A SEAT BELT.