Character mistake: When Jim gets home and finds the apple pie on the counter with a note from his mother, the note reads "you're favorite", rather than "your". (00:31:40)
Character mistake: In the scene towards the end, when there has been a bomb threat in the building, Billy Bob Thornton uses a pay phone to call the operator. He asks for the airline's base operations in "Greensboro, South Carolina". Greensboro is in North Carolina.
Character mistake: You'd think prison guards on Death Row would have known a little more about safe restraints, the way they bind and gag Percy could eventually kill him. They stuff a handkerchief all the way into his mouth, then tape his mouth closed. The gag reflex could suck the handkerchief into his windpipe and suffocate him in about three or four minutes. Even if he might be able to find away around the danger of suffocation the fact remains that no trained, experienced prison guard is ever going to restrain someone in that way.
Suggested correction: Not everyone even has a gag reflex, and it is easy, though not comfortable to push the handkerchief forward into the mouth with the tongue. You can see Percy breathing through his nose, so he's not running out of air. The other guards had no intention of leaving him in the cell for a long time, only long enough to teach him a lesson.
It doesn't matter what he "might" be able to do, or even if he could push the handkerchief forward. That's not the mistake. A trained, experienced prison guard would not restrain someone like that. Never.
Again, what might or might not have happened is irrelevant. No skilled, trained, experienced prison guard would apply a gag in this way.
Character mistake: When Morpheus is explaining to Neo the reason the Matrix exists, he states that a human being gives off 25,000 BTUs of body heat to help power it - this is just not true. Even human beings that are running a marathon can't give off that much heat, and the humans in the Matrix are all lying down, not moving.
Character mistake: When Amy goes to Virgil's house to apologize, Virgil tells Amy that the tree is exactly 14 steps away. However he then leads her there by taking 17 steps.
Character mistake: Why is Electra using Windows 2000 (still in beta at the time) to survey her oil empire? (I think it's just after she's asked M to come and help her) You shouldn't use beta software for anything important....
Character mistake: When Gordon describes Leonardo Da Vinci's idea for a flying machine, he mentions Da Vinci designed it in 1540. However, designs for Da Vinci's flying machines were dated as early as 1488 and Leonardo Da Vinci died in 1519.
Character mistake: When Kathryn reads the journal copy in the final scene, the camera shows some pages she reads. At one moment, one of the headings reads, "WORLD OF FREINDSHIP".
Character mistake: When Cole and his mother are stuck in traffic due to an pedestrian accident, a cop ignites a flare to place on the road by the car that hit the pedestrian. The police were already on scene, traffic was gridlocked up and down the street, nothing was moving, and he places the flare about 2 feet in front of the car - a move that is unsafe (potential fuel leak) and unnecessary. It would never be done on a city street, and never in heavy traffic. (01:27:25)
Suggested correction: We don't see the cop place the flare on the ground, the camera cuts away as he leans down with it. It could be assumed that he's putting it down but it's possible he's just bending down to pick something up and has to move the flare towards the ground to do that. Without confirmation that the flare was placed where it's suggested there can be no definite mistake.
Character mistake: In the scene where Denzel Washington and company are beginning to analyze the evidence from the first murder, Washington verbally lists some of the elements found at the scene including the "iron bolt". A little later, someone mentions "by the way, the bolt is iron, not steel" and Washington is surprised.
Character mistake: When a helicopter winch operator tries to get the gurney with injured Jim inside the helicopter, he doesn't have any gloves on. No wonder his hand gets injured when the cable breaks loose.
Character mistake: The Fifth Amendment Double Jeopardy Clause does not apply. Libby could be convicted of 1st Degree murder when she gets out and pursues Nick. It doesn't really matter to the plot, however, because it was what Libby believed to be true and motivated her. Further, she ends up shooting Nick in self-defense. So it's all good.
Character mistake: Henderson asks the guy as he's leaving the room to get him some bourbon. They already drank in the bar and spat it out when they found out that everything had turned to blood, so it would still be blood.
Character mistake: Thomas rips off his one glove as he makes his escape but then grips the bottom edge of the security door to slide under it. Smooth metal door would leave perfect finger and palm prints. I doubt detectives would miss prints on a door that was normally recessed away from the public. His prints may not be on file but would be easy to obtain once he was under suspicion. (00:19:20)
Character mistake: At the party when Michael tells a girl he's thinking of getting a Toyota Tercel, he says it has dual side airbags. The Tercel was never available with side airbags.
Character mistake: In the scene where Maggie tells her sister she is pregnant and how far along she is in her pregnancy, her sister says the child will be a Gemini, just like Einstein. Einstein's birthdate is March 14th, making him a Pisces. Lisa also mentions that Shirley Manson from the band Garbage is also a Gemini, when in fact she is a Virgo.
Character mistake: Mary Ann's mother's name is Janet. At the end when Tom is reading the note she wrote, she misspells her own name as Janent.