The left knee is busted. Stupid ROTC taught me to always lead with my left foot so now I have to reorient myself to lead with my right. Now I walk so funny that I have to tell my class what happened. I told the long story of the knee six times today. Twice for students and the rest for all the colleagues who wouldn't gather for a single telling. Six times is enough for the day. I only have one busted knee to go around with anyway.