I'm not sure what happened, but I went out today for a walk in the relatively pleasant weather (sunny, 45?F). At some point during the walk I felt "unbalanced" (I can't really describe the feeling) as if I were stooping over. Standing straight and walking only worked briefly, as I found myself stooping, as if letting gravity pull me forward. About four miles into the walk, I stopped to rest, which is unusual for me. Then, about 1/4 mile from home I was coming down an incline which had some snow and ice still, and all of a sudden I felt myself picking up speed, and I couldn't slow down. Well, I slowed down when I went down. I picked myself up and made it the rest of the way home, where I took off my mud-and-blood spattered clothes, took a shower and applied some bandages (left knee, right hand).
The index finger of my right (plucking/strumming) hand had some skin torn off, so I now have a bandage wrapping it. A couple of small abrasions, but nothing serious. Still, there's something going on internally that I can't figure out. My resting heart rate is about 20bpm faster than usual, and I'm feeling a bit of vertigo.
But I just spent about ten minutes playing with a pick. God, I hate picks. But with my torn up finger the way it is, I guess I'm going to have to get more comfortable with a pick for a while.