Picked the wife up from work and went into town, then dropped her back at her car and we drove home together. Let her reverse up the drive first, very icy and a good covering of snow, i then reversed up alongside her but a bit in front. Got out of the car, still had my door open(fortunately it was the Punto, Zed safely in garage) next thing I knew the wife's car was sliding down the drive, pinned me between her offside wing and my door. I'm a bit bruised but the door panel got a huge crease in it. It's going to be a merry christmas for the bodyshop. Thinking about it later I was lucky could have been much worse.