You know too much.
There was a lunatic who somehow got hold of a handgun. He was walking in a small, dark alley. Suddenly, he came across a young man. Without saying a word, the lunatic forced him to the ground and held the gun to his head! He asked: 'What is 1+1?' The young man was terrified! After thinking for a long time, he answered: 'Equals 2...?' The lunatic shot him without hesitation! Then he pulled the gun close to his chest and said coldly: 'You know too much.'
