I remember this thread from ten years ago, when I was still only lurking....
Enough Dead Cobra Owners! Enough Wrecked Cars!
And while none of us know for sure, a lot of us can easily guess how someone might "lose control" while passing a slow moving vehicle on a rural road. I don't think dual roll bars would have helped on this one -- although four or five point belts might have, instead of just the lap belt.