happened to me all last winter (and once so far this winter). Just let the clutch out slowly. I have had another car do the same to me when EXTREMELY cold.
I know this is a little late in the discussion to comment on this post, but...
I was able to do an axis spin in the MS6. It was icy and snowy and I had the summer tires on. I turned into the donut and cut it tighter and tighter til the car was spinning on it's axis. I've never been able to do...