I always pull my back out of place and im only 17. No im not lazy or anything either. Like one time I went to turn and my back just went out, I had to go to the hospital, because I couldnt barley move and I always pull it out of place. I've actually pulled it out place that I was stuck in a kinda hunched over to the side position for like 2 days, and I could not stand up straight. Im constantly having this happen to me. I think it could be from the way I sleep though, but still even if I turn the wrong way I can simply pull it out. And it hurts like h**l.