11 Things You Might Not Know About 'Fight Club'

This message flashes up at the start of the film.

When the narrator (aka. Ed Norton) is looking for Tyler, he checks the hotel phone bill. All of the numbers are real - and are for Hollywood Mega agency CAA.

The scene in which the narrator confronts his boss is an iconic one, but they had to re-film the parts where you see him from a profile angle, as they felt they could improve his side of the conversation. Unfortunately, the office that they used had changed slightly, and the thermostat changes from black to sliver to back again over and over.

Tyler Durden and Marla are based on real people. In fact, six of Palahniuk's friends are featured in the book. Before Palahniuk became famous, the real life Marla made him promise that if he ever made it, he would take her to meet Brad Pitt. Her wish came true.

Brad Pitt voluntarily had his tooth chipped by a dentist for the role.

The final scene (with the huge explosions) took a year's worth of computer graphics work. There were millions of pieces to animate, and then smoke elements to also add.

Chuck Palahniuk has been inundated with requests from members of the public to disclose the location of real fight clubs. He said: "You'd be surprised at the number of women"

There is apparently a Starbucks coffee cup in every scene of the movie.

One of the rules of Fight Club is that the members should always be shirtless when they fight. However, Bob (Meatloaf) wears a top. This is because the specially made fat suit was far too heavy for Meatloaf to cope with. It weighed around 100lb and was filled with bird seed. After every take, he needed an oxygen mask to recover.

When there's lots of water coming down the walls in the Paper Street house, it's actually a nod to Bladerunner. Both J F Sebastian's and Tyler Durden's houses look very similar.

Brad Pitt and Helena Bonham Carter spent three days recording orgasm sounds for the film.