Look at the card, its the only king that is trying to kill himself by sticking a weapon through his skull. lol
Also did you know there is only 2 one-eyed jacks in the deck?
hence when i play poker once in awhile i call the suicide king and one-eyed jacks as wild cards, making only 3 cards wild instead of 4 if call deuces or threes wild.
wow this fact i never knew