Stepped outside today to take a run in celebration of being out of shape, looked around and thought, "Everything's nice and cold. And it looks a little damp. And also upside down." At which point my poor dumb body, which was doing its best breakfall, slammed the back of my head into the front step. Thinking about this during the run, I found that I have no idea how to fall on stairs. I know how to fall down them, from watching Chevy Chase, but not how to deal with a situation like I had today.