My first encounter with black ice was in Germany. I was stuck in a traffic jam due to an accident. While completely stopped, a side wind blew me into a bus stop. I have great respect for black ice on the road.
My first was in Fairbanks. At maybe 20 mph, with no inputs to the steering wheel, brakes or the throttle I found myself doing a full 360. Fortunately there was no traffic and I stayed on the road. A real eye opener.