So I've been hearing this clicking noise when I extend my right leg. I can also feel the click if I touch my knee when extending. It's happening right at the top of my right knee, a bit to the right. As of yet, absolutely no pain in that area including after lifting/playing ball...I'm just a little nervous about it cause obviously something isn't right. Anybody have any experience with a similar clicking/cracking noise? Any ideas on what I can do to get rid of it?