I know about the whole dislocated shoulder thing. Both of mine come out about 3-4 times a year. EXTREMELY PAINFUL! Only mine don't go back I when they come out. It ususaly involves a trip to the ER to get it put back in.
The first time it happend was so incredibly painful that I ended up punching the doctor with my good arm cause he wouldn't give me any drugs until the "X-ray confirmed it was really dislocated". Needless to say, I'm never going to that hospital again.