EE WAS DRIVING A CLINE A22-R HAULAGE TRUCK TOWARDS THE WORKING FACE SECTION OF MINE ON A NEWLY ESTABLISHED SECTION OF HAUL ROAD WHEN THE DRIVER'S SIDE OF THE TRUCK DROVE ACROSS A LOW SPOT, JOLTING HIM IN HIS SEAT. HE WAS WEARING HIS SEATBELT. NO DAMAGE WAS FOUND TO TRUCK. HE STATED HIS BACK HURT. HE ALSO STATED SPEED MIGHT BE A FACTOR.