Visible crew/equipment: When Patrick brings Sabrina into his apartment for a threesome with Christie, he says to her "Not quite blonde, are you?" and you can see the shadow of the boom microphone fall across the wall. (00:40:19)
Audio problem: When Patrick Bateman is exercising and watching The Texas Chainsaw Massacre, the audio does not match up with the actual film. (00:37:05)
Visible crew/equipment: When Patrick Bateman is showing Detective Kimball out of his office, the boom microphone can be seen poking into the shot on the other side of Bateman's interior office window. (00:36:46)
Continuity mistake: When Patrick Bateman murders Paul Allen, the collar on his raincoat is either up or down, depending on the shot. (00:27:49)
Chosen answer: He tortures them. You can see them bleeding as they leave. Christy also says she had to have surgery afterwards.
LorgSkyegon