Josh Hartnett Josh Hartnett started hallucinating while filming the movie '6 Below.' The hallucinations were due, in large part, due to his weight loss. Hartnett is currently starring in the new film about real-life snowboarder/hockey player Eric LeMarque, who was stranded for eight days in a massive winter storm. During filming Hartnett wanted a realistic performance. While he lost a dramatic amount of weight he almost lost his mind. He described his diet as "miniscule.