I joined because while searching for a joints article to show my brother, I came across this site. I have to warn you, I often don't hang around sites too long. I can post as many as 1000 posts over a month long span, but for one reason or another tend to lose focus on the site sooner or later. Mostly it's just out of running out of new things to say I think. I can only go so long before saying everything I want to.
Anyway, I was interested in the site because I've long held interest in joints and stretching/manipulating them and muscles/tendons to achieve greater athletic results. I posted one reply and predictably have been drawn into posting more and more.
 I pop out my shoulder at will, just by rotating it any number of different ways. I can just lift it to the side and then pull it towards the front of me, even while sitting down, and hear it pop. I can have it bent and just rotate it in front of me. I can even just rotate it around without seemingly moving anything else and make it pop/crack. Shoulders are definitely the most awesome joints
 I pop out my shoulder at will, just by rotating it any number of different ways. I can just lift it to the side and then pull it towards the front of me, even while sitting down, and hear it pop. I can have it bent and just rotate it in front of me. I can even just rotate it around without seemingly moving anything else and make it pop/crack. Shoulders are definitely the most awesome joints