Ooooh, yeah. Going across a parking lot to a meeting. There was a wide patch of ice with a sheen of water. Okay. I can do this. I stepped on the ice very gingerly, very carefully, keeping my laptop/equipment bag close, and it didn't matter. The feet slipped, I tried to gain my balance, which only made it worse, pinwheeled, and bam! flat on my back.
I got up very quickly, partly because I splashed into the ice-cold water, but mostly because I wanted to look around and see if anyone saw me. A couple women about 30 meters away were looking, probably expecting the old guy to have a broken hip, and I just shuffled off the other way.
Got to the meeting. Brand-new client. My ass was soaked from the water, and as it turned out, my collar and tie had become mostly separated. Lovely.
I was stove up a bit the next day, but honestly, I think that falling flat on my back with the thick jacket on actually spread the shock around and kept me from getting hurt.