Ice!

The one night we should have left our windscreen wipers up so they didn't get frozen to the windscreen... we didn't even realize there was sleet coming (no TV, no radio...). The neighbor just ran his car for 20 mins to melt the ice off easily. We didn't have that foresight, so spent 10 mins forcefully scraping our windows with the engine running.
It is certainly an experience, and I do wonder about the relative efficiencies of running a horse and cart (or sleigh) over winter...