Conversation between teacher and studeng - ‘Laughter is the best Medicine.’

Teacher : Have you ever heard of Isaac Newton?
Student : Yes, Madam.
Teacher : What did he discover?
Student : Law of Gravity.
Teacher : Let me tell you how he stumbled upon this discovery. He was sitting on the ground looking at an apple tree. An apple fell on his head. This led to the discovery. What do you understand from this?
Student : Had he been sitting in a class like this and listening to you as we are doing now, he would never have discovered the law of gravity.