For half an hour I kept throwing out buckets of water. It was slow, hard work, but having a purpose and a goal lifted my spirits. But all too soon I was out of breath and energy. I was back to worrying, imagining horrible endings. I needed something to keep me alert. I started testing my knowledge. I named lighthouses, then the planets. Once Id finished them, I started on each planet's moons. Through it all, I kept saying, "I must not fall asleep.