I rolled mine last month. Coming back up the A3, longish right-hander, I was in the outside lane. Hit a patch of black ice, and the back end started coming round. Steering, brakes; nothing. We went sideways down the dual carriageway for what seemed like ages - fuck only knows how we managed to avoid any other cars - then the front driver's wheel hit the kerb. We were probably still doing between sixty and seventy at this point.
Apparently the first roll was more of a somersault. Then it landed on a side, and rolled a couple of times. We eventually landed at about 45 degrees, right-side-up, on a wide verge at the side. I'd got a cut on my head where I'd smacked into the door pillar, and my girlfriend had to be taken to hospital with a suspected fractured pelvis (fortunately this turned out not to be the case). Apparently it took four fire crews to cut us from the wreckage.
I'd say it was pretty much the most horribly unpleasant experience of my life.