My joints keep popping out of place.

You may have a connectivity disorder, it could be something like Marfan's Syndrome or Ehlos Danlos Syndrome. For instance, I have the gene for Marfan's. I've had my muscles be both loose and rigid. My muscles are loose now, and occasionally, my joints will pop in and out, or I'll pull something and suffer a temporary injury. Once, I was talking and one side of my jaw popped out and got stuck. I couldn't move my mouth. I pushed on the part that popped out and it, thankfully, it went back in. I do recommend that you consult a doctor on this. There are health concerns that go hand in hand with connectivity disorders. Good luck. :)