My 4 year old was in a booster seat in the back so seat belt was on him. when we went to unbuckle the seatbelt it locked. we attempted several times to unlock it, we tested all the other seatbelts which did lock and unlock. we could not get it unlocked and had to go into a local restaurant and borrow scissors to get him out. we tried for 15 mins at least to get the seat belt unlocked and every time it seemed to get tighter. my 4 year old had nightmares that evening about the seat belts and red marks on his shoulder. it is scary to think we may not have been able to get him out in an emergency. *tr