ACCIDENT INVOLVED CAR SPINNING THROUGH INTERSECTION REAR OF CAR IN DIRECTION OF MOTION, REAR OF CAR IMPACTED STATIONARY FORD F-150 THEN ROLLED INTO DITCH. DURING COURSE OF IMPACT DRIVER'S SEAT BACK DID NOT REMAIN LOCKED IN AN UPRIGHT POSITION, AT CONCLUSION OF IMPACT DRIVER'S SEAT WAS INVOLUNTARILY ALLOWED TO GO TO THE FULLY RECLINED POSITION, 6 YR OLD REAR SEAT PASSENGER WAS PARTIALLY IMPACTED BY SEAT BACK BUT DUE TO CUSHION OF SEAT NO MAJOR INJURY WAS SUSTAINED. *TR