Are there any classic killing jokes?

Some psycho got a pistol from somewhere. He walked in a black alley. Suddenly I met a young man, and the mental derangement pressed him to the ground without saying anything, pointing a gun at his head! Q: "What is 1+ 1?" The young man was frightened! Meditate for a long time. Answer: equal to "2"? That psycho shot him without hesitation! Then I held the gun in my arms and said coldly, "You know too much!" " "