1/31 Fell while running. A grey afternoon run, just a little above freezing. Hit the pavement first with my right knee, then both palms of my hands, a story I can piece together from the abrasions it left. Then I curled myself up into a little ball and rolled forward, absorbing the energy. I did scream loud, mostly out of disbelief. I’m rather proud of my reaction, but I wonder how much of it was actually learned, perhaps through the judo of my childhood, and how much was just the only way how a biped can actually absorb that kind of energy and come to lie still on the ground after missing a step.