"My character was going through extreme emotional trauma and it's hard for those types of things not to rub off on you," the Daily Express quoted him as saying. “Mark Ruffalo and I had to spout out three pages of dialogue. We had to talk through the wind machines, the rain machines and rats being thrown at us. But, just like the character, we had to persevere in finding out what was really going on in Shutter Island.
"A few weeks towards the end of filming, I started to forget where I was. We kept pushing this character further and further. It was day after day of re-enacting a traumatic event that was either a dream or reality for this guy. I remember saying to Marty, ''I have no idea where I am or what I''m doing''," he added.