Continuity mistake: Peyton lets Louis fall, who dives head first. A shot later he flies horizontally.
Continuity mistake: When Peyton's hand gets pinned to the beam, it keeps changing positions in every shot.
Continuity mistake: While standing on the beam, Louis cries "I built it all!", and the gun in his right hand appears and disappears between shots.
Continuity mistake: When Louis takes Robert's mask out and reveals Peyton's burnt face, Peyton takes his left hand to his cheek. When the angle changes, his hand is lowered and he repeats the movement. In the following shots the position of his hand is inconsistent all the time.
Continuity mistake: During the helicopter scene, when Peyton is hanging onto the cable, in the close-ups he's simply grabbing it, but in the wide shots the cable is strapped around his body.
Revealing mistake: When Paulie is thrown out of the window he is replaced by an obvious stuntman: His bald cap is way lighter than his skin, as opposed to Paulie's whose skin colour is homogeneous.
Continuity mistake: While on the helicopter, Peyton smacks a goon's face, who turns away and shows a streak of blood on his mouth. When the angle changes his head position has changed and is now facing Peyton.
Continuity mistake: When Guzman runs into Smiley wearing several masks, Smiley knocks him out. On the floor, Guzman's head is facing straight-up. In the close-up, it's tilted sideways.
Continuity mistake: The wet coffee circle stain on the paper is above the word 'date'. When the angle changes and the stain is dry, the circle has moved several centimeters below and is now surrounding the word 'date'.
Deliberate mistake: When the movie begins, Durant's men are frisked by Eddie's, one of whom was tossing his nunchucku seconds before. Angle cuts to Durant's men's weapons falling on the floor, the nunchucku among them. This adds up for tension as to show how heavily armed and dangerous Durant is, but is absurd that Eddie's goon disposes of his own weapon in such a dangerous situation.
Other mistake: Julie is standing 2 meters away from the building when it explodes. We see tons of glass, wood and burning debris fall everywhere, but not a single spark touches her. She remains spotless and immaculate despite the havoc.
Revealing mistake: When Peyton's hands are about to be burnt, they are a replaced by a very obvious prop.
Suggested correction: I personally see nothing wrong with the effect. While it is indeed a stop-motion effect, it certainly doesn't look cheap, the animation of the skin burning and curling is pretty smooth, and nothing inherently gives it away outside of the fact you know they wouldn't actually burn up the actor's hands.
