Having a bad back really sucks! Several weeks ago, I found I had thrown my back out (pulled a muscle). I couldn't figure out how it happened and best I could think was that I did it in my sleep. After a week it was much better but just a few minutes ago, I threw it out again. This time it was getting out of a recliner too fast. I had many years of no big problems with my bad back except some minor discomfort and now in just one month I've thrown it twice!