 Why does Jack stop going to meetings for the terminally ill?
The film opens with--literally--a surge of adrenalin, which travels through the bloodstream and into the brain of its protagonist, Jack (Edward Norton), who's viewed, as the camera pulls out of his insides, with a gun stuck in his mouth. An increasingly desperate insomniac, Jack finds relief (and release) only at meetings for the terminally ill. When Jack's apartment mysteriously explodes--along with his carefully chosen IKEA furniture--he moves into Tyler's squalid warehouse and helps to found a new religion: Fight Club, in which young males gather after hours in the basement of a nightclub to pound one another (and be pounded) to a bloody pulp.
 A woman, Marla, starts coming to the same meetings. Marla is not terminally ill.
 His apartment explodes, and he must move out of the meeting area.  He dies from a terminal illness.  Bob, from the testicular cancer group, has become too clingy.  A woman, Marla, starts coming to the same meetings. Marla is not terminally ill.