A 1992 FORD F-250 (2 DOOR) TOWING A PORTABLE CEMENT MIXER, ESTIMATED WEIGHT @350-450 POUNDS, CROSSED THE CENTER LINE AND STRUCK A 2006 TOYOTA TUNDRA CREW CAB (4 DOOR) HEAD ON. BOTH VEHICLES ESTIMATED SPEED WAS 50 MPH. ALL DRIVERS AND PASSENGER WERE WEARING SEAT BELTS, AIRBAGS DID DEPLOY. THE F-250'S DRIVER SUSTAINED 1 DETACHED RIB PLUS CUTS AND BRUISES. IN THE TOYOTA, THE FOLLOWING INJURIES OCCURRED: PASSENGER: BROKEN LEFT ANKLE, 7 BROKEN RIBS, STERNUM AND CLAVICLE FRACTURES, 7 INCH LEG LACERATION, 5 INCH HAND LACERATION, CUTS & BRUISES. DRIVER: BROKEN RIGHT ANKLE, BRAIN CONTUSION/CONCUSSION (VISIBLE IMPACT SPOT ON WINDSHIELD - SEE BELOW), BROKEN RIB, CUTS AND BRUISES. TOYOTA'S OCCUPANTS CONFIRMED THAT THE ENGINE/TRANSMISSION INTRUDED ABOUT 2 FEET INTO THE PASSENGER COMPARTMENT, CONSISTENT WITH THE ANKLE INJURIES. IT ALSO APPEARS FROM PHOTOS THAT THE WINDSHIELD WAS PUSHED BACK INTO THE DRIVER, ALTHOUGH THE BELT AND AIRBAG COULD HAVE NOT PROVIDED ADEQUATE PROTECTION ALSO. FRONTAL PHOTOS OF THE TOYOTA SHOW, APPARENTLY, THAT THE BODYWORK DETACHED FROM THE FRAME - THE FRONT OF THE FRAME IS CLEARLY VISIBLE & DOES NOT LOOK SERIOUSLY DAMAGED, WITH THE BODYWORK (INCLUDING THE BUMPER) PUSHED BACK SUBSTANTIALLY. IT SEEMS TO ME THERE ARE SEVERAL POSSIBLE DEFECT/DESIGN ISSUES HERE: 1. ENGINE AND TRANSMISSION CAME STRAIGHT BACK AND DID NOT DEFLECT DOWNWARDS, CAUSING THE LOWER EXTREMITY INJURIES. 2. MULTIPLE RIB INJURIES DESPITE OCCUPANTS BEING BELTED SUGGESTS EXCESSIVE AIRBAG I