Revealing mistake: When the skull the children leave at the caretaker's hut falls over and engulfs him in flames you can see the stuntman's protective head gear.
Revealing mistake: In the infamous raft scene, it is so obvious the child who gets stabbed in the throat with the hedge cutters is a real head attached to a dummy body, one; because his neck is too long and two; when he moves his head his neck stays ridged.
Revealing mistake: In the scene where the burned man attacks the prostitute (the first scene after he leaves the hospital) you can see him stab her with scissors, but when he takes them out we can see that they're missing tips for safety (they're too thick to have broken off inside her). (00:12:50)
Revealing mistake: In the raft scene where the garden shears end up hitting parts of the raft, there is one scene where the shears cut through one of the planks of wood. You can see that the plank gets cut too cleanly. No matter how sharp garden shears are or how fast they are being swung around, wood doesn't get cut this way. This plank has been pre-cut.
