Big Oy! to DR Laura, too, for sproinging her lower back.
I'll never forget the first time I did that, many years ago. I was alone in the house and I was in a near-panic, wondering if I'd damaged my spinal cord or something. I called a friend who had had many issues with her back and she talked me down. I soon learned the drill, which was to stay still, be careful, and let it heal on its own - however many days it takes.