torn meniscus. can't even run this sunday's marathon. everything was going good until I ran a cross country race early October and slipped on a wet tree root hidden in fallen leaves. its the weirdest thing, I can walk and run fine - but once I start jogging - its very very painful. fortunately I can still bike. consult and eventual surgery to follow - I'm not really mad about the injury - at least I know I'm still mobile.