Recently, I've noticed that when getting out of vehicles, I pretty much always have extreme pain in my knees. If I am able to stretch out inside the vehicle it is usually absent, but when I am cramped up inside a small vehicle (which is very often; I am 14 and already stand 6'2", fortunately I won't grow any more, which is another story) and have to keep my knees bent I notice that I get extreme pain in my right knee. Then, when I get out and begin stretching out, there is a sharp increase in the pain in my right knee, though shortly after wards the pain dissipates altogether; however, in my left knee, once I stretch a bit I get an intense pain, which feels like it is in the center of the knee, and it lasts for quite a while before eventually disappearing altogether. Also, I notice that any time I have my right knee bent for a certain period of time the pain returns. Anyone know a way to prevent this or at least why it is happening?