RedactedNarrative: OPERATORS OF UNITS 1 AND 2 WERE HEADING EAST OUT OF CROOKED CREEK. UNIT 2 WAS ADVANCED SLIGHTLY ON THE PORT SIDE OF UNIT 1. UNIT 2 MADE A HARD STARBOARD TURN DIRECTLY INTO THE PATH OF UNIT 1 UNIT 1 COLLIDED WITH UNIT 2 CAUSING GREAT BODILY INJURY 3 BROKEN RIBS, COLLAPSED LUNG, FRACTURED TIBIA, CONCUSSION, FRACTURED VERTIBRAE AND BROKEN PELVIS TO THE OPERATOR OF UNIT 2 SIGNIFICANT DAMAGE TO THE STARBOARD SIDE OF UNIT 2 AND ONLY MINOR DAMAGE TO UNIT 1. OPERATOR OF UNIT 2 WAS AIRLIFTED TO GREENVILLE MEMORIAL HOSPITAL.