Revealing mistake: In some extended edition cuts of the film, Regan backwards spider walks down a flight of stairs, and blood falls from her mouth. But her face isn't that of Linda Blair, but of a stunt double.
Revealing mistake: When Han is killed by Bruce Lee, and the door is spinning, you can see the belt that holds Han to the door.
Revealing mistake: When Tee Hee bends the barrel of Bond's Walther PPK, in the close-up, the score marks where the barrel has been pre-cut are visible.
Revealing mistake: A metal ramp is visible on the front bumper of the 1972 Ford Galaxie sedan when it rams the motorcycle head on.
Revealing mistake: In the scene where Sgt Howie hits McGregor (who is dressed as Punch) with a candlestick, watch closely and you can see that the blow from Howie is aimed into the padded section on the back of the punch costume, rather than at the back of McGregor's head.
Revealing mistake: The sliding door to the bedroom in Simonson's apartment appears to be covered with a sheet of 'bubble wrap' in early scenes of the room.
Revealing mistake: Right at the end when John is dying look at the texture of his blood. It is way too thin, almost like coloured water.
Revealing mistake: When Eastwood shoots off a portion of the bad guys ear, the resulting portion of the ear is very fake looking.
Revealing mistake: On the last building on the getaway run, the door is already open - if it had been closed it would have been too hard for the dogs to open.
Revealing mistake: The square base securing the knife in Alba's back is visible.
Revealing mistake: When the Jackal is shot at the end of the film, he's thrown back against the wall of the room which moves, revealing it to be a wooden set. Additionally, the hole in the wall with the stunt cable can be seen in slow motion.
Revealing mistake: In the final scene where Cigarette gets thrown off the train you can see the stunt double stepping off a box before jumping out of the rail car. (01:58:35)
Revealing mistake: After Nadine Varrick dies, she is still breathing - her arm moves up and down in a regular, relaxed fashion, as if she is asleep.
Revealing mistake: When The Kid sits next to Dillon at the Bruins game, there are two older women in the background looking directly at the camera and pointing at it, having just noticed that they are being filmed. (01:33:10)
Revealing mistake: When Frigga shoots a client in his house you can see the outline of the fake blood packets under his shirt.