Leonardo DiCaprio has confessed he lost all sense of reality by the end of the filming of his new thriller Shutter Island.
The Titanic actor, who studied the mentally ill and watched several dark documentaries to perfect his performance as a tormented cop stuck in a hospital for the criminally insane, revealed he barely had any idea of time and place.
"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.