Not quite the same, but similar.
Back when I was running a tow truck I got a call out. 15 pass Ford van converted to 4wd, one of those adventure style rigs. Family of 4 on a 2-lane road 65mph limit. Wife get's up to prepare the kids something to eat, front tire blows, van rolls killing both parents, kids are fine.
The front passenger seat area was perfectly in tact and she would have survived if she would have been in her seat and buckled. The driver's seat however was completely crushed and there was no chance of survival.
Each situation and accident is different. The van could have rolled differently and she could have been killed while in the seat but survived because she was loose in the back, surrounding terrain also plays a big roll in an accident as soon as the vehicle leaves the pavement.
My wife will not get up to just turn around in her seat to tend to a kid in the crew cab truck. If she can't deal with the issue from a buckled position, we take the next exit.