Continuity mistake: John kicks Mr. Brown through a glass window, and he goes through the glass. Camera cuts to behind the glass, and he goes through again. (01:14:20)
Revealing mistake: When John attacks the man in the kitchen, he throws him through some shelves and into a wall. The wall wobbles when hit. (01:12:40)
Continuity mistake: When Charlie is attacked in the bathroom, the items on the floor move between consecutive shots. Note the bottle, a flat item and toilet roll. They all shift position. (01:09:50)
Continuity mistake: When John and Charlie are in bed talking about Grace, Charlie's hands, which are behind his head, constantly change position between instant cuts. (00:44:50)
Continuity mistake: In the bar, the head on top of John's beer is constantly changing from a little to a lot and back. (00:23:20)
Continuity mistake: Near the start as John and Charlie are walking along the street, the street is in the shadows completely. When the shot changes, half the street is now in sunlight. (00:11:00)
Continuity mistake: When Charlie and John are walking at the start talking about "the old neighborhood" they are in the middle of the road. When the shot changes they are now on the pavement. (00:11:00)
Visible crew/equipment: As the brother are entering the subway after being dismissed, a train goes past the screen as a scene transition. In the shot of the train going past, the filming setup can be seen reflected in the metalwork. (00:11:15)
Continuity mistake: At the start we see Charlie sit/fall on to a seat on the platform of the subway. When he does, there is a group of people stood on the platform behind him. When the muggers appear, those people have gone. (00:03:30)
Factual error: When Charlie suggests "bleeding the brakes" on the train, or letting the air out so the train couldn't be tripped or stopped, that would have the opposite effect. Letting the air out of the brakes on a subway train applies the brakes. The air pressure keeps the brakes off. Eliminating that pressure would cause them to instantly clamp down. It's one of several safety redundancies. (01:24:10)
Factual error: After John and Charlie jump off the money train, it reverses and derails onto its side, and rolls for some distance in the tunnel, knocking down all support columns in its path. Those columns are not as flimsy as the film suggests, and would actually have sliced the train and/or cause it to buckle, as had happened with a similarly derailed train near the 14th Street-Union Square station in 1991.
