The main theme of Die Hard is a solo hero who has to fight alone despite the odds. He have to take on 12 terrorists alone and even he can contact outside, the police are not helpful at all except Powell who try to support John anything he can but also was held back by his boss. The terrorist leader Hans is also calm and calculated, that makes John need to face tougher obstacles and need to overcome them. This movie shows the sense of reality when a man faced this kind of danger more than other action movies around that time.