Struck against a moving object
BACKING UP TO RIB SANDROCK THAT WAS SHOT, JARRING AND RIPPING FOR APPROX 6 HRS. SUDDENLY HE FELT A SHARP PAIN IN LOWER BACK, SEVERE ENOUGH TO CAUSE HIM TO STOP FOR A FEW MINUTES. PAIN CONTINUE D THROUGHOUT THE SHIFT.
BACKING UP TO RIB SANDROCK THAT WAS SHOT, JARRING AND RIPPING FOR APPROX 6 HRS. SUDDENLY HE FELT A SHARP PAIN IN LOWER BACK, SEVERE ENOUGH TO CAUSE HIM TO STOP FOR A FEW MINUTES. PAIN CONTINUE D THROUGHOUT THE SHIFT.