A brain walks into a bar and says, I’ll have a pint of beer please. The barman looks at him and says, Sorry, I can’t serve you. Why not?, asks the brain. The barman retorts, Because you’re already out of your head.
Human brain is the most outstanding object in world. It functions 24 hrs a day, 365 days a year. It functions right from the time we are born, and stops only when we enter the examination hall.