Corrected entry: When the cops find the Russians in the alley, one corpse has a giant footprint on his back. This allows the detective to form his "serial crusher" theory. However, when the events are shown later, no footprints are ever made on the Russian. Connor doesn't land on him, feet first, and he's never stepped on, while Norman searches and cleans up.
Corrected entry: In the scene where Smecker is reliving the firefight at the poker game, he says that six men attacked. When he says this, you can see only five men in the background. Also, when he screams, "There was a firefight!" you can see the Duke's figure in the background, not the six men as claimed.
Corrected entry: In the scene where Rocco kills the peons and the bartender, he shoots the first guy, and then he pulls back the gun as if he's going to hit the second guy. Then the second guy is shown being shot. But the time between Rocco pulling back the gun and the guy being shot is too big, considering the scene was in slow-motion.
Corrected entry: As Connor and Murphy are wrestling around inside the upper vent shafts, the shaft loosens and the two fall through the ceiling. If you look closely, as the bodies begin to come down, you can only make out one. It seems as if the other is not there.
Corrected entry: As the police are investigating the shootout at the hitman's poker game, the first gun outlined on the ground has a red handle and is not a revolver. None of Il Duce's semi-automatic pistols have a red handle, as you can see when he reveals his 6 firearms.
Corrected entry: The biggest hole in the entire story: Chekov is listed in the beginning of the movie as merely a "soldier" and is later referred to by Smecker when he says "not like those other mob peons in the alley." But if Chekov and his buddy were mere peons, they wouldn't have been invited to the big meeting at Copeland Plaza. Smecker said the nine men in that room were all big-timers, and "I have a dossier on every man in this room."
Corrected entry: When the Saints call the FBI Agent on the phone, they are shown calling from a payphone to a payphone. During that scene, they cut to a shot of the agent's business card, where the only phone numbers listed are an office number and a cell number.
Corrected entry: In the scene in which Conner jumps off the building after he drops the toilet, we see him fall slow-motion beside the Russian - his legs do not touch him, but when we see the Russian dead, he has foot-prints on his back.
Corrected entry: Each time the Saints kill someone, they say a prayer. Towards the end of that prayer, they pull the hammers back on their guns to cock them. There are two problems with this: 1) On an "auto-loader" (non-revolver) with a hammer, the hammer is not intended to be cocked manually, but rather cocked when the slide is racked. 2) Racking the slide chambers a round and cocks the hammer back. While it is possible to have had a round in the chamber and the hammers forward, they would have had to rack the slide, then (very unsafely) lower the hammers onto the firing pin/firing pin mechanism, creating a scenario where an accidental discharge is much more likely. (i.e. when wrestling in the vents).
Corrected entry: As the three are having their wounds sealed, Norman is having his done first. As Sean Patrick is sealing the arm, Rocco is holding Norman down. You can see that Rocco's finger has almost entirely stopped bleeding already and is wrapped. Yet Rocco is the next one, getting his finger sealed.
Corrected entry: As Agent Smecker and the others are investigating the multiple-murder scene in the Copley Plaza hotel room, one of the others is suggesting that one man shot with two guns. Right before the flashback at the end of this scene, Agent Smecker says, "You telling me that one guy came in here and killed eight men with eight extremely well-aimed shots?" Yet in the very beginning of the same scene, he said there were nine.
Corrected entry: While Connor is attempting to rip the toilet out of the floor, he almost knocks the lid off of the tank. In the next shot, as he is standing up in slow motion, the lid is back in place. (00:22:30)
Corrected entry: In the scene where the Russians are being yelled at in the hotel by their leader, his name and surname are written - and his surname ends with an "a." Only female surnames end with an "a" in Russia.
Corrected entry: After the stand-off with the Duke, Murphy is the first of the three to have his wound sealed. Conner removes the iron from the stove, but in the next shot it is clear that there is blood already on the tip, and only the tip, of the iron, as if a wound was sealed before him.
Corrected entry: As the toilet (which Connor dropped off the roof) hits Ivan Checkov's head, it is clear that it is a fake toilet. You can see a top, flat part of the toilet which does not exist. (00:23:30)
Corrected entry: After they cut themselves free from the rope in the hotel scene, they pull the rest of the rope out of the ceiling. How was the rope strong enough to hold two men and weak enough to be barely yanked out? (00:43:53)