It was on a Tuesday night at a watering hole near my house that I first noticed it. The main course had been cleared, the coffee had arrived and I was contemplating a cognac or a grappa. The company was bright, interesting and warm. I wanted the evening to stretch out ahead, even though I had lots to do the next morning, early. I pushed my chair back, went to cross my legs and discovered that I could not lift my left leg off the floor. In retrospect, I had been having significant back pain. But I've had back pain almost constantly since being in the army 35 years ago, so I made nothing of it. Leg symptoms were another matter. I finished the coffee, passed up the after dinner drink and headed home as soon as it was polite.