I don't know how I did it.
Maybe the leaning towards my screen to read the tiny text in the SQL statement design window, maybe I yanked something while lifting freeweights last night.
Whatever, somehow I've pulled my back. Just the right lower side, which leads me to suspect the squinting at computer screen scenario >:(
It seems that unless I do a 180 in the recovery department, I will NOT be fencing tomorrow. Indeed, this evening, I promised D. I'd spend the bulk of my time on the sofa with a heating pad.
Dammit, I hate being ... less than optimum!