Mark Hamill on demons in 'Arkham City' Joker

Ever wonder what makes Batman's nemesis The Joker tick? Us too. Well after hearing rumors that The Joker would actually be revealed to be a demon, or possessed, in the hit new game Arkham City, we went straight to the source: Mark Hamill, the voice of the Clown Prince of Crime.

Here's what Hamill had to say about his own paranormal beliefs, and about The Joker: