I have done a 180° skid-turn on a straight road in snow. My friend Mary was going to the store a couple days ago and a big truck (lorry) came off an exit ramp and she did a 270°skid-turn -- she said she was shaking an hour later!

When I fell on the ice in the driveway after putting out the rubbish bins a couple weeks ago I was annoyed by the cars whizzing by, no one wondering why that man was laying down in the snow. That was a 90° skid that ended abruptly!