Mine doesn't come completely out of socket but will make a loud pop about once a year. It is random when it happens. Since I pretty much hunt exclusively with a bow it is kind of chance. Most of the time it is when practicing, like was stated earlier, after lots of shots and tired muscles. I have noticed that if I work my shoulders out lifting weights that it doesn't happen as often. In fact it hasn't done it at all since the first weekend of last December. Good luck to you.