At this point Jack realized the insanity that he had created in his head, and how it effected his body, and actions.
He attempted to resolve the problems that he created, but they were to large to fix.
This gambit, which many of Fight Club's original audiences found infuriating, is actually so well established in the genre that Brian De Palma could play a joke at its expense in Raising Cain, where John Lithgow's imaginary father turns out to be real after all.
Fight Club is the third and most complex in director David Fincher's loose trilogy of nightmare movies, following Seven (or Se7en, to be strictly accurate) and The Game.
As he attends them more and more, he discovers that someone else has been doing the same thing as him. He confronts her about this, and they decide to split the help groups up amongst each other. Tyler is a soap salesmen who Jack meets on a flight back home.
They become friends after Jack’s apartment blows up in some kind of freak explosion.
Adapted faithfully from Chuck Palahniuk's novel, the film follows a buttoned-down insurance minion (Norton) who projects himself as flamboyant, anti-social, charismatic genius revolutionary Tyler Durden (Pitt), in order to shake up his own life and, in the end, society as a whole. By externalising an alter ego as an apparent actual person played by another actor, Fight Club might seem to be cheating — but is merely using the device Robert Bloch did in his Psycho novel, where Norman and Mother have long talks.
The splitting of one persona into "Jack" (if that's his real name and not a convenience plucked from a Reader's Digest-ish magazine he finds) and "Tyler Durden" evokes Norman Bates and his mother, but also echoes that other once-surprising revelation, that respectable Dr. There are similar instances in not a few horror films, like the Lucy Comes To Stay segment of 1972's Asylym (which Bloch wrote) where repressed Charlotte Rampling and homicidal Britt Ekland are one person, or The Other (1972), from Tom Tryon's novel, where one of a set of twins turns out to be either a ghost or an alternate personality.
His fight club that he had created, was so large, that wherever he went, there were members.
The only way he knew how to end the madness was to physically destroy his alter ego.