Bingo. My old man had an accident in a 1973 Falcon, a tool box in the boot put a hole in the rear seat, snapped the front bench seat.They're called "crumple zones" and yes I am familiar with them The point was it looks worse than what I would associate with a fender bender and the impact would've still caused some sort of shock/sudden movement.
Head on, car rear ended another car into Dad on his side of the road.
He has never been the same, lifelong back and spine injuries. He crumpled big time.
Also, drug and alcohol tests are just part of the procedure, don't read anything in to it, unless there is a positive test.