Although he had ridden on a subway many times, he did not take notice of the guards, so as preparation for playing the character he rode on a subway for "practically an entire day" to observe them.
虽然已经坐过很多次地铁，但他从没注意到其中的警卫，所以为了演好这个角色，他坐了“几乎整整一天”的地铁，来对这些警卫加以观察。