I guess what I did was dislocate a vertebra. I was lifting the container off of the compost and it was stuck. So, I heaved it up with too much force -- thinking I was doing it in a safe way, my back straight, my legs bent, using my legs to lift, etc.
Heard a loud pop and kind of fell down...... I could not stand up and had to crawl across a field and up the steps to my trailer! It was very dramatic.
I did not ever get xrays but I did get a couple of chiropractic treatments -- the first one, we sort of bullied the poor man into making a housecall that night. His final reason he didn't want to come was no table, well, we had a massage table a friend brought over for that very reason.
Anyway, that helped a bit, but rest and some energy work helped much more. I stayed in bed for a couple of weeks, but I was able to walk upright within a day or two, just not easily and not far. I had quite some pain at first, took a whole lot of ibuprofen for a while, but that settled down too.
And my back is still wonky. I never had the money to get it treated very much! But even so, it is gradually gradually becoming stronger. The injury was in 2011. Long ago and in another country....