WE WERE REARENDED BY A LARGE PICKUP TRUCK THAT WAS TRAVELLING AT A HIGH RATE OF SPEED AND THE DRIVER DID NOT APPLY HIS BRAKES. WE WERE STRUCK WHILE ATTEMPTING AND MAKING A RIGHT TURN, SPUN AROUND CLOCKWISE AND FLIPPED ON OUR TOP, TOTALLY DEMOLISHING OUR CAR. OUR CONCERN: THE AIRBAG SYSTEM DID NOT ENGAGE RESULTING IN INJURIES REQUIRING IMMEDIATE TRANSPORTATION FOR HOSPITALIZATION FOR THE DRIVER AND PASSENGER. THE ACCIDENT OCCURRED ON A PAVED, RURAL-TYPE STREET WITH LITTLE TRAFFIC PRESENT. THE DRIVER HAS A BROKEN NECK, MULTIPLE INJURIES INCLUDING A CLOSED HEAD CONCUSSION.