Revealing mistake: During the final race, Wrangler is shown knocking a yellow car off the race course. A few seconds before this, there are two shots from behind Wrangler, that are just still frames. The shot does not show Wrangler driving or even moving and is completely still. The shot from behind is merely just a still image, that has been extended to last a split second. The same still frame image is also repeated two shots later. (00:27:35)
Revealing mistake: When Langdon comments on the geometric pairing of the two pyramids you can tell the point of the crystal pyramid is slightly to the left of the point of the other pyramid.
Revealing mistake: When Chev discovers he's been poisoned and picks up the TV, you can see it's not turned on, nor does it have any wires. (00:04:00 - 00:05:00)
Revealing mistake: After the scene with the apothecary where the two eunuchs purchased the belladonna it then cuts to Esther, and in her closeup as she lifts the silver cup to drink, there's a small white modern sticker on the underside of the cup. (01:02:00)
Revealing mistake: They let us see the stunt double's face for the girl Steven Seagal is fighting in the ending Cathedral scene, and she looks nothing like the actress.
Revealing mistake: The reaction of the jogger being hit by Clark's bat is way too late.
Revealing mistake: When the American man throws a square concrete tile at the monster it reacts (moves its foot in pain) before the tile actually makes contact. (00:16:11)
Revealing mistake: Right after Sage plays chicken with the cops, the cop car is shown peeling out in reverse to follow her down the alley. The dust from the burnout is ejected towards the back of the car. Being a Crown Vic, the car has rear wheel drive but the dust should be moving opposite the car's direction. What this shows is that the car was actually being pulled backwards as it attempted to accelerate forwards. What's more is that even the sound is of a car spinning its tires opposite to being dragged. (00:12:50)
Revealing mistake: At one point in Heat Miser's song, he eats two fireballs. Directly above the second fireball you can see the reflection of string used to hold it up.
Revealing mistake: Throughout the scene when it is revealed that Jack has been offered a six month trial with the local team, the wall clock is stuck at the same minute and second. (00:18:30)
Revealing mistake: When Lindsey runs to answer her phone after she asks Slevin to explain why he was still wearing a towel, you can see the tattoo on Josh Hartnett's left shoulder blade coming through the makeup.