I noticed on the train home today that on the right side you could see dark gray clouds and impending rain but in the left side of the coach the sky was full of high fluffy clouds and the sun was shining thru all the windows along that side. I  never thought that it mattered which side of the train you sat on but clearly where I chose to sit would affect my mood and how I felt about the journey afterward. I wonder if the sun is shining on both sides of the coach up there in first class?