Thanks for all the well wishes!
Unfortunately it kinda sucked. I went to bed Saturday eve. just fine, then awoke on my Birthday hardly able to move. My back is fucked. This has only happened a few times in the last few years, and I have put two and two together to realize it was from swinging side to side when dumping the scrap trailer. This time I have no idea what caused it. It's only muscle, and not spine related, but having it happen the morning of your 52nd Birthday does little to make you feel it's just a number.
I did manage to go out to dinner with family and friends, and I'm going to attempt some light work today. Getting older is not for sissies, but it beats the alternative.