Couple weekends ago I completed my first organized 1/2 century in about 3 hrs including 2 rest/fuel stops. Had a great free lobster dinner w/ free Gritty's ale, and set off for home 28 miles away, mostly up hill. Got about 10 miles out (head winds all the way), and my left knee started aching, then lateral meniscus really started throbbing. I couldn't think of anyone to call, so I completed the ride, pushing with all I had with my right leg, letting the left 'go along for the ride'.... wasn't able to ride for a couple of days, but it's been fine since. In hindsight, I wouldn't have done this again, as I may have really done some damage....next time discretion over valor!