I heard a knock on the my door. I glanced at the clock. It was 3 in the morning. I turned over in bed, but didn't get up. I heard a knock again, louder this time. Who could it be? My parents were most certainly asleep. If there were a fire, someone would come bursting in, they wouldn't knock. The person knocked a third time. I reluctantly crawled out of bed, muttering under my breath, and opened my bedroom door. Before me...