Several weeks ago my daughter dropped me on my head. We were roughhousing near the pool and she threw me in, forgetting there was a crawl-out bench inside the pool, and my head hit the edge of the bench. Dazed, I floated to the surface of the pool, and dragged myself onto the Sundeck. A bruise the size of a tropical banana swelled on the back of my head. Within days dark streaks ran down my neck and puddled above my clavicle.