Almost did this in the parking lot at work. The problem was that it was 90% solid ice with little patches of wet pavement, so as I slid down the little incline from my car, I suddenly got traction. Managed to stay up and penguin walk it the rest of the way.Stepped off my front porch this morning onto the sidewalk in Ankeny and my feet went right out from underneath me. Landed flat on my back. Laid there for a few seconds to make sure nothing was broken and then got up and slid my way into the garage to get out the ice melt.