I haven't had skinned knees like this since I was a kid. That's not really a picture of my knees, but anyhow.
I started going to an Aikido class at the rec center twice a week. On Tuesday, we did this knee-walking thing that gave me some fairly small patches of rugburn right on my kneecaps. No big deal. Some Neosporin, and everything was OK.
Until last night. I was wearing these white sweatpants to train in, and after the initial knee-walking part, I happened to look down at my pants, and they had all these brown splotches at the knees. Sure enough, I had ripped up my knees again enough to bleed through my pants. Ow.
But I did fix the backward-rolling issues I was having on Tuesday, and I learned my first throw. Now if some would-be attacker grabs my wrist, then stands really still to let me think about what I'm doing, I can step behind him, twist his arm down behind his head, and pull him to the ground. Provided he doesn't try to resist, or have a gun or anything like that.