A 24 year old boy seeing out from the train's window shouted:
"Dad, look the trees are
going behind!"
Dad smiled and a young couple sitting nearby, looked at the 24 year old's childish behavior with pity, suddenly he again exclaimed:
"Dad, look the clouds are running with us!"
The couple couldn't resist and said to the old man:
"Why don't you take your son to a good doctor?"
The old man smiled and said:
"I did and we are just coming from the hospital, my son was blind from birth, he just got his eyes today."
Think before you speak.(: