The darkly humorous thing is, though, that less than two years before that comic, Jason Todd actually SAVED JOKER'S LIFE!!

Of all the Robins who have fought by Batman's side, Jason Todd has experienced the most hardship and trauma. In the infamous "A Death in the Family" comic arc, the Joker brutally beat Jason to death ...

Joker is one of DC Comics' most disturbing villains, but the regular Joker isn't even the most disturbing variant of the character.

Batman has a strict no-kill rule in DC Comics, but there are a few of his villains who are very much too deadly to stay alive ...