Factual error: The priest says that St. John saw the number 666 in his vision, but it was actually 999 inverted. St. John wouldn't read modern Arabic numerals like we do, it would be Roman numerals. The number 666 would actually be DCLXVI. (01:05:40)
Continuity mistake: When Silent Bob renders the demon disabled by using the anti-odour spray, you see him take the spray out of his coat and spray with his thumb. However, it cuts to a front view, and he is clearly seen using his index finger. It then cuts to Bob's rear, and he is, again, spraying with his thumb.
Continuity mistake: When Nicholas Cage is being escorted to fetch the roll of film from his car, there are a few scenes where the accountant is holding a gun to Nicholas's head. When the camera is directed at the accountant, two hands can be seen grasping the gun, but when the camera is facing Mr Cage, initially there are two hands but after the next switchback there only appears to be the one! (01:20:50)
Continuity mistake: When Sam and the other girl fall down the mountain, at one shot Sam unlocks the girls snowboard and it drops down the mountain but at one shot before the ski patrol throws the rope down to them you can see (for a second) on the right side of the girl, the corner of the snow board. Then she doesn't have it.
Continuity mistake: The tape is labelled "Vincent Grey" in the first shot, but the label disappears in the next shot. (01:11:32)
Continuity mistake: When Tracy sets up her card table before school there's a close up of each leg being flipped out. If you count; theres five legs shown from a four legged table.
Continuity mistake: When Sikes is put into the headpiece and Claw has the power turned up full force the chin strap is first around Sikes's chin, then it isn't, then it is.
Continuity mistake: In the flashback to the death of the headless horseman, when the horseman's steed gets shot and falls to the ground, the blood and the wound are on the right side of the horse...later in the scene when the horse is seen again, the wound is on the left side of the horse. (00:16:45)
Continuity mistake: At one point about three-quarters of the way through the movie, when Lowell Bergman (Al Pacino) and Don Hewitt (Philip Baker Hall) are talking, watch in the background as a certain lady walks past after Don says something. When we cut back to him he says something else, but the same woman in the background appears and walks exactly in the same direction, just like in the previous cut. (01:52:35)
Continuity mistake: When Mary's grandma is teaching her to dance, Mary falls and breaks the table, but later when it flashes back the table is fixed then it's broken again.
Visible crew/equipment: Near the end of the film after Depp leaves the castle after shooting Balkin and gets into his car you can see a crew member in the side view mirror as Depp opens and closes the driver side door.
Visible crew/equipment: While young Joan is lying in the field next to the sword, in the far right corner you can see a pair of legs and a camera lens pointed at the actress. (00:06:35)