In my right shoulder, I can move the bone around and make it repeatedly crack like cracking you knuckles, but I can do it in every single direction: up, down, left, right, and diagonally... I've always been able to do that but I'm not sure if I should be concerned about it... sometimes I have to move the bone around until it is in a spot where I can move my arm without any weird feeling in my shoulder... any thoughts of should I be concerned or not?