For a couple of days this week, imagine my surprise that I awoke to no trembling or even pain in my lower limbs.  None of the severe shakiness that makes me feel that I am balancing on jelly.  No sign of the often debilitating pain that feels as if my legs are being squeezed in a vice, and which makes me wish that I could tear my legs off and discard them as many young children do with their dolls. For...