'The Machinist' (2004) is a psychological thriller in which Christian Bale plays Trevor Reznik, an industrial worker suffering from severe insomnia. Bale's dedication to the role is evident in his extreme physical transformation, as he lost a significant amount of weight to portray the emaciated Reznik. The film delves into Reznik's deteriorating mental state and the mystery surrounding his condition. Bale's haunting performance and the film's atmospheric cinematography make 'The Machinist' a gripping and unsettling viewing experience.