Henrik and Sergio are golfing rivals. Sergio has never won a major championship. Henrik wins them all the time. On the eve of the Open Championship, Sergio removes Henrik's putter (a type of golf club) from Henrik's bag and hides it. He knows that Henrik will find it difficult to win using a new putter. He is right. Henrik is forced to buy a new putter when he discovers his loss and putts badly throughout the tournament. He comes second and Sergio wins. Sergio then returns the putter as he had always intended. Discuss.