In my years of being a Firefighter I've seen many vehicles in multiple parts. The controlled crash test videos, while giving a safety baseline, are in no way what actually happens when Murphy's law gets pushed to the limits.
Worst wreck i had to work was a quadruple fatality where the vehicle, a Honda accord, was tore into 3 peices after wrapping around a very large telephone pole.
The front seat area, door...driver in seat...center consol..passenger in seat and passenger door was stuck on the pole. The engine compartment tore loose and shot counter clockwise around the pole and the rear of the car ripped loose and shot clockwise around the pole.
All died except the passenger setting behind the driver, only one wearing a seat belt, and the car impacted on the drivers door. The rear of the car lodged into the side of a huge RV bus. My crew and I lifted up on the rear end piece of the vehicle and rolled it back from the RV and the guy undid his seatbelt and walked away. The other two in the back seat were shot under the RV and died on the way to the hospital and the two up front were dead on scene as the two front doors were compressed to within a foot of each other.