Don't wheel alone, ................. May have saved them, probably not in this case but.........
According to the article they were traveling w/a group who witnessed the accident. The only thing that would have gave them a chance would have been wearing their seat belts. As our hobby has grown, it is far more common to see people nit wearing seat belts than those that do. I know most of my friends don't, and a few of them have already been in more than one roll over. I think most people think w/such a slow speed, not much can happen by not wearing a seat belt.
No seat belt=easy Darwin Award Nominee.