We were in a 9car pile up. Front and back and drivers side were hit and severely damaged. Airbags did not deploy. After the accident smoke was seen coming from the sides of the car where the seat belts come out of. Both front and back were white puffs of smoke from all four seatbelts. The front passenger seatbelt failed to tighten on impact as all the other seatbelts did. Passenger was thrown about the front area, hitting multiple parts of the body. Car is currently in a tow lot. Insurance is going to inspect it.