* At the end of the film, Bateman's lawyer insists Bateman couldn't have murdered Paul Allen, as the lawyer had dinner with Allen only a few days ago. While this might seem to support the notion that the murders were all in his head, it's shaky evidence at best; Batemans lawyer confuses Bateman for another one of his clients, so who's to say he really had dinner with Allen, instead of another yuppie he thought to be Allen?
** This is actually hinted at twice, during the final scenes of the movie at Harry's Bar. First, when Bateman walks in and sits down with the others, [=McDermott=] gestures over to Bryce and mentions that he "just got back, and he's drinking mineral water. He's a changed man." This indicates that Bryce has just returned from a not-insignificant trip. Where to? Well, just after Ronald Reagan's speech later on, if you pay close attention, Bryce speaks several of his lines in a bad British accent, as a pretentious person like him might do after spending a few days in England. It seems likely that Carnes had dinner in London with Bryce, whom he thinks is called Paul Allen. [[note]]This sits well with WordOfGod which states that the movie was made under the assumption that the murders did take place.[[/note]]
* I just realised why the main character's name is significant. Patrick '''[[{{Film/Psycho}} Bate]]''' man.
** He also appears to '''Bait''' all of his victims.
* Bateman's [[CostumePorn lengthy descriptions of the outfits]] that people wear have a slightly sinister hidden purpose. After a bit, the reader stops bothering to read every little detail about how "Hamlin is wearing a suit by Lubiam, a great looking striped spread-collar cotton shirt from Burberry, a silk tie by Resikeio and a belt from Ralph Lauren," which occurs nearly every chapter. This causes the reader, much like the yuppies themselves, to not pay that close attention to what Bateman is saying, which can, in a few cases, much like his "friends," cause the reader to miss [[BreadEggsMilkSquick something horrific that Bateman might say mid narration]], while simultaneously showing how the reader, who is supposedly actively "listening" to what Bateman has to say, begins to treat what he has to say about things with the same lack of care that the yuppies do.
* WordOfGod said that [[BretEastonEllis he]] very deliberately chose what outfits that he was describing in any given scene, so that if you actually look up the clothing products, you'd realize how clownish and stupid they look together.
** Related to the clothes as well - almost every time the narrator, in a single scene, praises someone's clothes (usually his own) and ridicules someone else's clothes, the two people being talked about are wearing almost identical outfits- but from different brands!
* In the movie, Patrick's business card is colored "bone". Patrick's a SerialKiller.
** Also note that Bateman's card has a typo, spelling the company's name as "Pierce &Pierce", while everyone else's cards have it as "Pierce & Pierce", a very obvious mistake that nobody else seems to notice. Possibly because nobody at the table noticed that they had ''all'' misspelled "Acquisitions" as "Aquisitions".
%%* In addition, the lettering is "Cillian Rail", a typeset that doesn't exist. Cillian is an Irish name and one of the meanings is strife, which is bitter disagreement and conflict. Rail can also be used as a verb to mean complaining, accusing or insulting. The business card scene, in Patrick's eyes at least, is a ''very'' serious conflict that actually leads to him killing another character over it.
* The Wall Street firm Bateman works for is called Pierce & Pierce, also the name of the firm Sherman [=McCoy=] works for in [[Literature/TheBonfireOfTheVanities The Bonfire of the Vanities]].
* The first time I saw the movie, I was trying to figure out what the artworks in Patrick's apartment were supposed to be depicting. (the black and white art print of the man in the suit) At first I thought the man was supposed to be falling but with the pose, I realized the pose suggested he is being attacked, with his arm held up defensively. Can also count as Foreshadowing if you notice it before Paul Allen gets axed in Bateman's apartment.