Continuity: In the final rampage through the corridor, Preston shoots through the door, killing the guards on his side but also those in the room - we see them falling to one side. But when the corridor guards fall through the doors, in shots from Preston's point of view the guards are visible standing just inside the door before being knocked down.
Great sites
Quotes
John Preston: You're an offender!
Reading Room Proprietor: I'm not!
John Preston: No? Then why are you so scared of me?
Mistakes
In the pistol whipping scene, we see Preston deploying a set of "studs" from his pistols. However, in a later shot, where we see the pistol butt's closing reflection on a visor, the studs aren't out. See more...
Trivia
Originally the emotion suppressing drug everybody takes in the film was supposed to be called 'Librium'. Kurt Wimmer changed it after discovering that there actually is a drug with this name. See more...
Equilibrium mistakes
Continuity: The photo of Cleric Partridge with Mary O'Brien is crumpled and folded when we first see it in the morgue and when Cleric Preston shows it to O'Brien. However, when Preston is sitting at his desk and looking at the photo by himself, closeups of the photo show it as smooth without the signs of wear and tear seen previously.
Continuity: In the scene where John Preston finds the room with the snow-globe and the record player, he is shown removing and dropping his gloves as he walks the hall touching the wall, prior to discovering the room. As he is shown entering the room, he is also shown removing the gloves that he had just moments ago discarded.
Equilibrium trivia
The word 'tetragrammatron' has some very interesting origins which render the film either profound or pretentious, depending on your point of view. See http://www.bbc.co.uk/dna/h2g2/A3477909 for a full explanation.
Towards the end of the movie, Preston is in a white suit. This suit was derived from another white suit, worn by Bruce Lee in the film "the Chinese Connection", during the funeral scene.
The scene where Preston clubs a whole bunch of guards to death with his spiked pistol butts took only 30 minutes to shoot.
Equilibrium quotes
John Preston: Then I have no choice but to remand you to the Palace of Justice for processing.
Mary: Processing. You mean execution, don't you?
John Preston: Processing.
Mary: Let me ask you something. Why are you alive?
John Preston: I'm alive... I live... to safeguard the continuity of this great society. To serve Libria.
Mary: It's circular. You exist to continue your existence. What's the point?
John Preston: What's the point of your existence?
Mary: To feel. 'Cause you've never done it, you can never know it. But it's as vital as breath. And without it, without love, without anger, without sorrow, breath is just a clock... ticking.
DuPont: The gun katas. Through analysis of thousands of recorded gunfights, the Cleric has determined that the geometric distribution of antagonists in any gun battle is a statistically predictable element. The gun kata treats the gun as a total weapon, each fluid position representing a maximum kill zone, inflicting maximum damage on the maximum number of opponents while keeping the defender clear of the statistically traditional trajectories of return fire. By the rote mastery of this art, your firing efficiency will rise by no less than 120%. The difference of a 63% increase to lethal proficiency makes the master of the gun katas an adversary not to be taken lightly.