Glad to hear that no one was hurt. The same thing happened to me on the motorway after just picking up my supe although it was snowing and there was ice on the roads. This was during february when we had the bad snowfall. I was driving at about 50mph when the back end of the car suddenly felt light and the car started to veer off towards the crash barrier so i turned the other way to avoid it and ended up doing a full 360 across three lanes on the motorway and i was left pointing in the right direction. luckily there were no other cars coming. I learnt a valuable lesson, sups with crap tyres and bad weather conditions dont mix.