A hard side impact in passengers door could do the same.
Or
Driving down the interstate and hitting a small but heavy object in the road that fell off a truck could flip the car and crush the roof down (happened to my uncle in a early 90's f150, put him in a coma for 5 days)
Or
Stuck by lightning

Point is never know what is going to happen.
Just do your best and enjoy as much as you can.