I also managed to do something to my knee. Started running and my left knee felt funny. I stretched it and kept going. Then it became too painful to keep running, so I decided it was ok to stop running and give the knee a break. Unfortunately I was about a mile from the apartment when I decided this (stubborn me), and had to walk/limp the whole way back.
It's feeling a bit better today, so hopefully I'll put shoes to the pavement Monday or Tuesday.
TC Marathon Countdown: 161 days