Innocent murder. What's the joke of escape from mental illness?

This passage refers to a clip called Innocent Murder, which is a film created by American horror film director James Winterbury. The film tells the story of a man named Jeff who escaped from a mental hospital but was not convicted. He was ready to go home, but he found that his home had been controlled by a group of cruel killers. Jeff tried to protect himself and his family with his talent and courage, but he didn't expect to face a group of vicious killers. How can he live in such a dangerous environment?