Oh, My Aching Back

      On vacation this week, and since Saturday, I have been suffering lower back pain.  It may be another kidney stone.  Or it may be due to a fair amount of ladder and small-diameter spiral stair climbing Friday, when I had occasion to go to the top of the Salesforce tower downtown.  The view is great, but it comes at a price.

      Either way, I think I'll go back to bed.