The narrator reviews these examples in order to provide context for his nearly crippling phobia of being buried alive. As he explains, his condition made him prone to slipping into a trance state of unconsciousness, a disease that grew progressively worse over time. He became obsessed with the idea that he would fall into such a state while away from home, and that his state would be mistaken for death. He extracts promises from his friends that they will not bury him prematurely, refuses to leave his home, and builds an elaborate tomb with equipment allowing him to signal for help in case he should awaken after "death".