EE WAS DRIVING A HAUL TRUCK, WAS LOADED AND HAD BEEN HONKED OUT BUT DID NOT PULL OUT IMMEDIATELY. SHOVEL HAD RETURNED TO THE BANK, THEN OPERATOR REALIZED THERE NEEDED TO BE A VISUAL OF TEETH FOR DRIVER. AFTER HONKING THE HORN, EE BEGAN TO SWING BACK AROUND AND SAW THE TRUCK STILL THERE AND TRIED TO STOP THE SWING. HOWEVER, THE DIPPER HIT THE BACK OF THE TRUCK, JARRING THE DRIVER.