电影《电锯惊魂4》是一部由达伦·林恩·鲍斯曼执导的恐怖片，于2007年10月25日在中国香港上映。唐尼·沃尔伯格、肖妮·史密斯、托宾·贝尔和斯科特·帕特森等主演，该片以其扣人心弦的情节和惊险刺激的氛围而闻名。

影片讲述了一个变态杀人狂的门徒利用他的新发明进行杀人游戏的故事，这些游戏让参与者更加深刻地意识到生命的价值。

在前三部电影中，残忍的杀人狂魔“竖锯”最终被抓获并丧命。然而，在《电锯惊魂4》中，观众发现一连串令人震惊的事件。首先，竖锯的门徒阿曼达（肖妮·史密斯饰）与竖锯亲手培养的女杀手，经过对杰夫（安古斯·麦克菲登饰）的折磨后，一同离世。

与此同时，联邦调查局探员斯特拉姆（斯科特·帕特森饰）和派莱兹紧急赶到竖锯的秘密刑房进行取证。然而，特别行动组SWAT的指挥官瑞格（莱瑞克·本特饰）却突然被绑架，并卷入了一个致命的死亡游戏中。他必须在90分钟内通过一个个致命的恐怖陷阱，才能保住自己的性命。

斯特拉姆在得知这些事件后，意识到这些犯罪手法与竖锯的作案风格极其相似。他开始展开调查，并找到了竖锯的前妻吉尔·塔克（贝茜·拉塞尔饰）。随着调查的深入，罪恶的根源逐渐浮出水面，过去的受害者相继出现，所有的秘密似乎都将揭晓。

Saw 4 is a 2014 American horror-thriller film about a doctor named Edward who gradually becomes Discover the unusualness of the hospital, the fact that it is controlled by the patient, and his emotional entanglement with the female patient. The female patient was not mentally ill, but was sent to this hospital by mistake. The protagonist of the story, Edward, is passionate about his profession, but he finds that the hospital has become a veritable hell, where patients and psychiatrists are plunged into an abyss of madness and fear. Edward found a cellar one night in which the real dean of the mental hospital, Benjamin Sauter, was imprisoned. Realizing the seriousness of the matter, he decided to rescue the dean and escape from this place. In the process, he faced extreme violence from patients and doctors, as well as rejection and hatred from female patients. In the constant escape and struggle, he finally succeeded in taking the dean away from this place, but he also paid a huge price, and his body and mind have been severely injured. Hell Hospital shows the darkness of human nature and the horror of mental illness through in-depth psychological analysis and bloody scenes. This movie shocked the audience with its real horror stories and cruel pictures, and at the same time brought people's thinking and attention to mental health