I was heading to the car to go to church this morning. We got a bit of snow about a week ago, maybe 3". It stayed below freezing for the most part until today, so even without any new accumulation it had actually stuck around. Anyway, I had a travel mug (no lid) full of hot tea. I had poured the boiling water on it maybe 2 minutes previously, if that long. Almost got to the car and stepped on an icy spot. I'm still trying to figure out the mechanics of the following half second, but the end result was I fell, hard. Primary impact points were my right knee and elbow. Remember that mug of tea? That went pretty much entirely into my face scalding the heck out of my forehead.
Took a minute or so to get back up. Had to just sit for a bit. Been taking plenty of Advil since then. Didn't bother trying to stand during the songs at the service. Managed to get DW to drive home (I still drove to church), and wound up sort of napping a good bit of the way home. Been moving slow most of the day. Nothing is broken, or anything worse than bruised. I have an appointment with my MDS tomorrow, and if I can work it in I'll go to a really good chiropractor that's in the same general area since I'll be down there anyway.
Now, I'm as mentioned I'm still trying to work out the mechanics of the fall. But here's what I think happened. Because I landed on my right side leg and arm and ended up on my hands and knees, and with the hot tea hitting me in the face I think my right foot hit the slick spot. In an attempt to save the situation I tried to pitch forward to keep my body over the right foot. But my left leg didn't (or couldn't) respond fast enough to get back under me and down I went.
I'm not sure that I would have been able to stay upright without PD. But it is my left side that is more affected, so it's possible that without the bradykinesia on that side it might have made a difference.
Point being, even if you're not especially advanced in your PD be extra cautious with potentially icy conditions this winter. I didn't think it was that bad, and the majority of my driveway wasn't that bad, but spots obviously were and I wasn't careful enough.