Linda Hamilton trained with former Israeli commando Uzi Gal and with personal trainer Anthony Cortes for three hours a day, six days a week for 13 weeks before filming Terminator 2: Judgment Day. Under both, she trained intensely with weights and learned judo and heavy military training techniques. She had to maintain a demanding non-fat diet even during filming and lost 12 pounds. Because of this punishing regimen, she declined to reprise her role for Terminator 3: Rise of the Machines. She also learned to pick locks for the scene in the mental hospital where she does precisely that with a paperclip (x).