CONSUMER STATES THAT WHEN SHE UNFASTENED THE 30-80 POUND BELT POSITIONING BOOSTER CAR SEAT, IT SLID OFF THE UPHOLSTERED SEAT AND OUT OF THE VEHICLES DOOR, CAUSING CONSUMERS DAUGHTER TO LAND HEAD FIRST WITH THE BOOSTER SEAT ON TOP OF HER, THE CHILD WAS INJURED, CONSUMER STATES THAT THE SEAT NEEDS A STRAP OF SOME SORT TO HOLD IT IN PLACE AFTER THE SEAT BELT IS INFASTENED. *SLC