Where do you put your wallet? Last century, my back used to go out frequently. I'd move wrong, hear/feel a pop in my lower back/upper buttocks area. Then I'd have to head for a place where I could lay for an indefinite time. Doc would give me flexeril and I'd be able to function (some) after a week or so. I moved my wallet from my back pocket to my front. No more problems. I took a while before I'd freak out not finding my wallet back there.

That's good advice, too! ^^