Continuity mistake: In the opening murder scene a large stripe of blood suddenly appears across the connecting train car doors after the man slips in the pool of blood. (00:01:18 - 00:01:42)
Visible crew/equipment: In the opening murder scene watch when the man is stood outside the connecting train car doors, there is a shot from behind, moving in on him, and if you look out of the left window you can see a set of yellow ladders. This is set equipment and the train obviously can't be moving. (00:02:20)
Character mistake: When Leon goes to see Susan Hoff with his photography portfolio she tells him he needs improvement. After she leaves, Leon tells Jurgis that he thinks she hated his work and Jurgis tells Leon "when she hates somebody's work she gives them about a minute, you got three." In reality, she actually did give him one minute almost to the second. (00:06:58)
Continuity mistake: Throughout the film we see Mahogany attack people with his hammer and blood will spray everywhere however Mahogany stays mostly or even totally clean. A good example of this is when Leon follows him onto the train and there is a shot of Mahogany, seen through a train door, repeatedly striking a victim with his hammer and blood is spraying all over him. He's totally clean a couple of shots later however. (00:51:12)
Continuity mistake: When Maya and Jurgis arrive at Mahogany's apartment building, in order to search for evidence, it is night time. However, once they start searching his apartment, Mahogany arrives back home and you can see daylight outside his apartment windows. (00:59:31 - 01:02:55)
Visible crew/equipment: When Maya is searching Mahogany's apartment there is a shot of her looking in a bathroom cabinet mirror and you can see the arm of a crew member wearing a short sleeved white T-shirt reflected in it. (01:02:22)
Continuity mistake: At one point, when Leon is fighting with Mahogany on the train, there is a shot of blood dripping off a knife onto Leon's face. This blood later vanishes. (01:20:02 - 01:21:19)
Revealing mistake: After Mahogany is thrown off the train, as the train brakes and begins to stop, there is a shot of one of Mahogany's hung victims and you can see the whole body vibrate like rubber, which it was made out of. (01:21:47)
