Jerry 'Psycho' Seinfeld

Jerry even attacked Kramer!

Kramer:  Jerry, are you here?
Jerry:  I've had it with you Kramer.

Kramer: No, Jerry...don't kill me!
Jerry: Let's go to my dungeon...

Jerry: Shall I use a knife, pistol, or bare hands?
Kramer:  Nooooooo Jerrrrrrrrryyyyyyy!!!

Jerry Attacks George
Jerry Attacks Elaine
Jerry Attacks Kramer