Knee Surgery - When I was about 27 or so I jumped off a fence wearing a 50-pound paragliding bag. Yeah, real smart. My left knee hurt like hell for a month or so but got better, my right knee healed faster. In the last 13 years I've put more miles on my body than long distance trucker, and that knee never really felt great. I just dealt with it. Then last November I was kite skiing and ambitiously hucked a pretty good air that unfortunately greatly exceeded my ability to successfully land it...