I had a best friend. His name was Billy. We went to school together and hung out all the time. Then, one day, Billy stopped coming to school. I didn't see him for weeks. There were rumors that he had suffered a nervous breakdown. One evening, when my parents were out, there was a knock on the door. When I answered it, Billy was standing there. He was acting very strangely. His eyes were tired and bloodshot and he looked like he was very nervous. He kept looking around and glancing over his shoulder. "I need to talk to you," he said. I invited him inside and closed the door. He sat down on the couch, but he could't relax. Something was really bothering him. He was twitching and his leg was shaking. "Are you OK?" I asked. "My parents think I'm crazy," he said. "Everyone thinks I'm crazy. Even I thought I was crazy for a while..." "And, are you crazy?" I asked. Billy let out a humorless ch