When he was a little boy, Mark's mother set the house on fire. (She was like that.) He'll never forget the look on his father's face as he gathered him up in his arms and raced through the burning building onto the pavement below. And he stood there, shivering in his pajamas, and watched the whole world go up in flames. And when it was all over, he said to himself, "Is that all there is to a fire?"