What is this called exactly? So I suffered from a knee dislocation (my knee cap was completely out of socket and 60 degrees to the right of where it should have been) almost 6 years ago and I'm still having trouble with it but it seems that every time I go to the doctor they don't understand what I'm talking about, or worse they do this thing where they try to see how far they can push my knee before it pops out of place (this makes me sooooo uncomfortable, I have an awful habit of favoring it but thats most likely due to the fact that it had a habit itself of popping out after the injury). I haven't had my knee fully dislocate for years now but my problem that I'm having has been going on since the first dislocation. My leg will almost buckle and then a sharp pain will run up the back of my knee and the front, right below the patella. The best thing I can think to describe it as is when you pull a rubber band tight and it pops because while it hurst like hell when it first happens, the pain generally fades quickly. The big issue is that 1) When do I know this is about to happen? I literally have seen no correaltion with sports or activity vs rest and 2) When it does happen, I basically lose the ability to straighten my leg completely because it does the rubber band thing again and again. The only thing that seems to help it is pulling my foot up to my upper leg and basically folding my leg in half. Its almost as if part of my muscle or something is catching on something and just ripping or literally popping.