I WAS T-BONED IN THE PASSENGER SIDE. THE CAR WAS SPUN A COUPLE TIMES BEFORE COMING TO A STOP. THE PASSENGER IN THE CAR WHO WAS PREVIOUSLY WEARING THE SEATBELT IMMEDIATELY NOTICED THAT THE SEATBELT WAS NO LONGER BUCKLED. WE BELIEVE THE SEATBELT CAME UNDONE ALMOST IMMEDIATELY BECAUSE EVERYONE ELSE IN THE VEHICLE HAD BRUISING AND BURNS FROM THEIR SEATBELTS BUT THE PASSENGER DID NOT.