The Chronicles of Bob : The Mysterious Killer

One day a mad man escaped & was armed with a gun. He caught a guy in the alley, pointed the gun under his chin and ask in a low deep tone, " 1 + 1 equals to how many?"

The hostage was frightened and he answered the question with caution,

"Er..ermm...2..?"

With that and BANG!, he was dead.

The mad man then turned to walk away and he said calmly,

"You know too much."

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When you just got to learn to ignore.