BillyBlake

Revealing mistake: In the opening scene you can see Paolo breathing, despite him being dead and all. [If you have trouble seeing it, watch the shadow on his back move up and down as he breathes.] (00:03:05)

BillyBlake

Revealing mistake: When John and the terrorist fall down the stairs together, you can hear the snap of the terrorist's neck signifying his death but at the bottom you can see the terrorist's "corpse" is still breathing. (00:36:00)

BillyBlake

Revealing mistake: When Vito Corleone is walking Johnny Fontane out of his office, he opens the door and you can see an extra walk by and stop, look at the camera and actors, and back up out of the shot. (Mentioned on the commentary). (00:24:30)

BillyBlake

Revealing mistake: In the scene where Wallace takes over the town after his wife is killed, watch as one of the English archers gets thrown off the scaffold and you can see him fall into a large pad.

BillyBlake