Continuity mistake: When Matthew Broderick is watching his girlfriend on the wall with his camera, he starts painting the wall white. After he gets a good patch painted, they go in for a close-up. The close-up however is of him painting the wall from a few seconds earlier. You can tell this by his girlfriend making the same head movement, right before they cut to the close-up and the roller going in the same direction as it did before the close-up.
Maggie: I don't want him back, I just want him vaporized, extinguished! When I'm done with him, he'll be just a twitching little stain on the floor.
Sam: Oh my God! Oh my God he's killing her.
Maggie: Yeah, he's killin' her all right, and she's loving every minute of it.
Maggie: Well, that is, without a doubt, the most pathetic thing I've ever heard.
Sam: You don't understand.
Maggie: And I don't mean that in a trivial way. I'm a photographer, I've seen a lot of things. I once took pictures of a man who ate his own legs, and you would be the black sheep of that family.