Oh geez, those were horrible to read about. I did see one (well, right afterward). In sudden heavy rain traffic on the highway came to a quick halt. One of the cars in an effort to not rear end the cars ahead of it veered off onto the right shoulder & up the embankment. It flipped itself over on the embankment completely crushing the passenger compartment down to the hood & trunk. It was awful just to see that.
When I saw the rain ahead I pulled over & got gas. Later saw that car flipped ~ I'd been driving behind it for a long time
