Bad back...

I did something (I still don't know what) to my back on Saturday, and today I can barely walk, let alone do any serious work, so I just wanted to let everyone know - nothing is going to get done today (well, I'll do some computer work and some taxes or something, but I can't lift anything, so no cutting/welding/shipping/etc). Hopefully it will start loosening up soon and I'll be able to say, pick up objects that are below waist height, or go up and down stairs without using my arms...stupid back.