I am going for tennis coaching nowadays. The other day, the coach was especially ruthless. He had made me run so much, that at the end of the session, I found myself looking to the skies for respite. And what did I see when I looked above. I saw two huge TV cable lines running along the breadth of the sky. The sky was a clear blue with many tufts of cloud scattered here and there. The cable lines gave an effect that the sky had been divided into regions by them. The sight reminded me of something, of which I can provide you a snapshot. Look below :-
Guess this is what happens when you work too much with excel plots and scatter diagrams.