Why do we fall, sir?

I just want us to be the happiest and the coolest of all Yeah! That's a perfect plan Dammit! Right?!

Come knock on my door
What I'm looking for
I think you should know
You started up fine
Put me to the floor
Please don't resist anymore
I'll never leave you alone

oh can you see what I see

During rehearsals, Brad Pitt and Edward Norton found out that they both hated the new Volkswagen Beetle with a passion, and for the scene where Tyler and The Narrator are hitting cars with baseball bats, Pitt and Norton insisted that one of the cars be a Beetle. As Norton explains on the DVD commentary, he hates the car because the Beetle was one of the primary symbols of 60s youth culture and freedom. However, the youth of the 60s had become the corporate bosses of the 90s, and had repackaged the symbol of their own youth, selling it to the youth of another generation as if it didn’t mean anything. Both Norton and Pitt felt that this kind of corporate selling out was exactly what the film was railing against, hence the inclusion of the car; “It’s a perfect example of the Baby Boomer generation marketing its youth culture to us. As if our happiness is going to come by buying the symbol of their youth movement, even with the little flower holder in the plastic molding. It’s appalling to me. I hate it.” However, Pitt is quoted on the DVD commentary as saying he has since had a change of heart about the new Beetle.
101 / 30 Ma

When Lou sees the Fight Club members in the basement of his restaurant, Lou punches Tyler in the stomach. When Tyler gets punched, you can see the Narrator double over slightly as if he too was punched in the stomach. A few shots later, Lou kicks Tyler in the face while he is kneeling, and in the background we see the Narrator’s head go back at the moment of impact.

When the Narrator hits Tyler Durden in the ear, Edward Norton actually did hit Brad Pittin the ear. He was originally going to fake hit him, but before the scene, David Fincher pulled Norton aside and told him to hit him in the ear. After Norton hit him in the scene, you can see him smiling and laughing while Pitt is in pain.