Revealing mistake: After GW recruits Bunny to help the chiefs to escape and to acquire rifles and ammo, he comes home asking where the Katie with light red hair is. Katie, excited, goes out on the bedroom landing and sees him at the bottom of the stairs again asking where the woman of the house. Is. Just in back of GW, you can see the shadow of Mrs. Warren waiting to talk to him. Mrs. Warren then appears to try to tell him she was quitting her job.
Revealing mistake: When Agard is lifted and dumped into the oil mining cart during the brawl at the clay mud pit the cart is pushed towards the pit, and in the wide shot as the cart rolls toward the camera we can see the rope attached to the bottom of the cart pulling it, just before Agard falls out.