EE WAS HOOKING UP AN AIR COMPRESSOR TO THE PINTLE HOOK ON THE BACK OF A SERVICE TRUCK WHILE THE TRUCK WAS BACKING UP TO THE COMPRESSOR. EE RIGHGINDEX FINGER WAS CAUGHT BETWEEN A SHACKLE ON THE HITCH OF THE AIR COMPRESSOR AND THE PINTLE HOOK.CAUSING LACERATIONS AND A FRACTURE TO THE FINGER