How Did Batman Choose His Gravely Voice? [VOICE]

The Christopher Nolan Batman films are some of the best of the comic book genre.  Despite getting Oscar nods and critical acclaim they still manage to catch some flack for one thing, and that's Batman's crazy voice once he puts the mask and cape on.  So how did he decide on that voice?

There have been a lot of parodies on Batman and his crazy voice, but this is one of the best. It would have been awesome if they had gone with Batman using the voice of Pacino or John Malkovich though. Check out more funny videos from the people of College Humor.