Those big SUV's roll pretty easy. My uncle has some pictures of a late model Trailblazer that flipped over in FL. I guess the lady lost control on the highway in the rain and over it went. The scary part is that the entire roof just crush's in!
The thing is sitting on an angle from the front of the back doors to the hood!
Somehow the driver managed to not get crushed.
I don't think they are very safe at all. I would rather be in a big sedan than a truck or SUV in a crash. I have seen pictures of a number of rolled Mercedes with the windows unbroken!