A manager was told by his doctor to take up some sport for exercise, so he decided to play tennis. After a couple of weeks, his administrative assistant asked him how he was doing.

"It's going fine," the manager said. "When I'm on the court and I see the ball speeding towards me my brain immediately says, "To the corner! Backhand! To the net! Smash! Go back!"

"Really? What happens then?" the woman asked enthusiastically.

"Then my body says, 'Who? Me? Don't talk nonsense!'"