Tried maneuvering my way into a free space on a bench on the subway. Precarious. Would have been successful if not for dropping my water bottle, a mammoth 1.5 liter full, directly onto the knee of the woman beside my seat-to-be. I apologized profusely and she seemed to harbor no ill will, but when we arrived at her stop she literally limped off the train. I thought hopefully, maybe it's from a prior condition! But then realized I may have exacerbated some old injury, and felt worse.
Hydration is important, though.