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[The biggest challenge of the role was] the mindset, the psychosis; I remember when Heath Ledger talked about playing the Joker…I always used to look out of the side of my eye, going ‘yeah actors,’ but there really is a darkness when you are playing someone psychotic you have to go there mentally. It’s almost like we look over a cliff and picture yourself falling so that gives you a fear of it. So this is falling for six months and kind of what that means to you.