Continuity mistake: When Peyton returns to his lab after its destruction, a burnt picture of him and Julie is on the floor. The destroyed picture shows half of Peyton's face missing. After finding a new place to stay, when the picture is put into the scanner, more of Peyton's face is visible. (00:28:10 - 00:30:40)
Continuity mistake: When Durant shows up at Darkman's hideout in a helicopter, he is holding a machine gun. In the next shot, he's holding a grenade launcher. (01:10:20)
Other mistake: When Durant uses his cigar cutter to cut off Eddie's fingers, no blood is shown squirting from his severed digits and no blood is seen on the cigar cutter. (00:05:15)
Plot hole: Whatever happened to the one legged henchman? He was one of the villain's lead goons in the first half of the film, but he simply disappears after the scene in Chinatown. The previous correction that "Peyton didn't have time to track him down" is complete nonsense. He literally vanishes from the film. (Due to a deleted scene, but that's no excuse either way.) There's absolutely no reason he still wouldn't be in Durant's gang and in the remainder of the film.
Continuity mistake: When Durant and his thugs attack Peyton, as Durant asks about the memorandum, Peyton says he doesn't know what Durant is talking about. To this, Durant replies, "Unfortunate." Durant is literally right next to Peyton. Durant's thug then grabs Peyton, and it cuts to a wider angle. Durant completely vanishes between cuts. Both shots are pointed in the same general direction, so Durant should be (very) visible in the background of the wide-shot.
Continuity mistake: When Durant walks into Louis' office, after he places the glass on the table and says he's got good and bad news, his arm is either stretched out or not depending on the angle.
Continuity mistake: At Peyton's lab, after Julie tells him she can't help him and walks down the stairs, wooden crates suddenly appear on the floor between shots.
Continuity mistake: When Durant exits the courthouse the passers by are not continuous between shots. Furthermore, a woman in red reading a paper walks by twice.
Continuity mistake: When Durant is arrested, he places his right hand over his left wrist. The cop handcuffs his left wrist but, in the following shot, Durant's right hand disappears and is replaced by the cop's hand.
Continuity mistake: During the dancing freak scene, Peyton holds an iron bar and looks at his reflection on a puddle. He lets go of the bar, which falls on the floor. He then takes his hands to his head, but the reflection on the puddle shows his arms at waist level. Also, in the following shot the iron bar falls on the floor again.
Continuity mistake: When Durant leaves his cigar inside a beaker by a lighter, the cigar points in a 12 o'clock position. When the shot changes it's at 3 o'clock. When Peyton crawls towards it it's back to 12.
Continuity mistake: When Guzmán finds the papers at Peyton's lab he holds them by the middle. When the shot changes he is grabbing them by the corner.
Continuity mistake: At the burn ward, the doctor sticks a pin in Peyton and says "he can't even feel it." Peyton is in an 11 o'clock position moving to 12 o'clock. When the shot changes he's in a 9 o'clock position.
Continuity mistake: Peyton arrives at his destroyed lab, grabs a computer screen and holds it vertically. When the shot changes he's holding it horizontally.
Continuity mistake: At the hospital, when the doctor talks about Peyton's injuries, note that in front of him stands a group of doctors with a medicine cabinet behind them. When Peyton escapes and they all return to the room, the cabinet has been replaced by a window.
Continuity mistake: At the fair, Peyton runs away with the pink teddy elephant and Julie goes after him. She passes by a woman holding a bunch of balloons. In the following shot the woman is nowhere to be seen.
Continuity mistake: When Julie is handcuffed, hanging on some rods, in the close-up shot the watch on her right hand disappears.
Continuity mistake: When Julie free falls she is facing a 9 o'clock direction. When the shot changes she is now magically facing 6 o'clock.
Revealing mistake: When Peyton is making Paulie's mask, note the burnt right hand typing on the keyboard. It moves like a stop-motion object, revealing it's either a robotic hand or an animated effect.
Continuity mistake: After Peyton stops holding Louis' leg, he opens his hand and there is no visible damage despite having just had a huge nail pinned through it.
Suggested correction: You may not agree with the filmmaker's choice, but that doesn't make it a plot hole. It's an unresolved character thread, nothing more.
It's not the filmmakers' choice, though. He was meant to be in more of the movie, but his death scene got cut by the studio to shorten the runtime. So yes, it is a plot-hole, given he was one of the main goons and simply vanishes.
This still isn't a plot hole. In the reality of the film, that character does not partake in any of the gang's activities after the last time he's seen. His presence is not integral to the plot and the story still works without his arc being resolved, so this isn't a plot hole by definition. A plot hole is a gap in the film's logic that cannot be explained, and a side character not having their story resolved on screen does not fall under that definition.
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