Revealing mistake: Bo and Luke are supposed to be trapped inside closed coffins after the bandits lock them up, then leave. Bo and Luke begin "rocking" the coffins back and forth, to tip them over so they can escape. However, watch Luke during this action. He is suppposed to be trapped inside a darkened coffin. But each time he rocks left or right, the camera slips a bit, revealing the barn interior and a little bit of equipment.