WE WERE REAR ENDED WHILE SITTING AT A REDLIGHT. THE IMPACT WAS HARD ENOUGH TO LAUNCH THE 6000 LB EXPEDITION 20-30 FEET INTO THE INTERSECTION. 2 OUT OF 5 SEAT BELTS OPENED UP AND THOSE 2 OCCUPANTS WENT FLYING AROUND IN THE CAR. THANK GOD IT WAS NOT A HEAD ON COLLISION. I NEVER RETESTED OR CHECKED THE SEATBELTS AND THE VEHICLE WAS TOTALED AND SENT TO A SALVAGE YARD IN NC BY TRAVELERS INSURANCE. INJURIES WERE WHIP LASH, STRAINED NECKS AND CERVICAL COMPRESSION AND CONCUSSIONS. *TR