INJURED STATED THAT AS HE WAS TRAMMING THE MOBILE BRIDGE CONVEYOR THRU A DIP INT HE MMINE FLOOR AND AS THE MBC MOVED OUT OF THE DIP IT ROCKED FORWARD RAISING THE REAR AND OPERATOR'S DECK OF TH E MBC, CAUSING INJURING TO BUMP HIS HEAD ON THE MINE ROOF. INJURED HAD NO LOST TIME UNTIL 11-10-03.