I'be been told by one doctor to get tested for it, another told me not to worry. My shoulder and knee tendons pop and slide, my clavicals dislocate anytime I move my arms past a 90 degree angle. Yesterday, I was moving my leg and heard a LOUD POP like I had crack a bone or whatever, and then noticed a slightly sprained ankle. I just turned 26, and am in relatively good health. Anybody have something similiar?