I was a big fan of the Christopher Nolan Batman films, so of course I had to do an homage to them. Back in 2008 I drew "Why So Serious?" where the Joker has Batman strung up and removes one of his leather boots so he can go to town on his exposed, vulnerable sole. Christian Bale definitely needs to smile more, anyway. Hope you go batty for this one! (Sorry, it's late. My pun game is weak).