Glad you're ok Alex! Black Ice - ugghhh! Two years ago this month, my wife and I were driving to work on a two lane local road above a reservior. It was dry out with no visible ice. All of a sudden around a curve, the guy in front of me starts skidding and hits the guard rail, I applied my breaks and hit the same patch of black ice that he must have hit. Unfortunately, my car plowed through the guard rail. Next thing I know, we're rolling down the embankment (seemed like slow motion). Fortunately, there were no trees in the way and quite a bit of snow to cusion the impact. We ended up up-side down at the bottom of the embankment, about 15 feet from the edge of the water. Thank God for seat belts - they kept us strapped in. We were hanging up-side down like a couple of bats. We were able to unbuckle the belts and crawl out the front since the windshield was gone. Neither of us was hurt. We got cut-up a little climbing up the embankment, but that was about it.
Even though this one was probably unavoidable, I've since calmed my driving down quite a bit.