Visible crew/equipment: When the killer chases Amy down to the boathouse there is a shot of her running along the side of the boathouse and you can see a crew member stood with his hands in his pockets and looking at the floor (he's wearing a brown jacket, black pants and a cap). Left side of the screen, it's very quick but clear as day. (00:53:41)
Factual error: The person who has the kidney removed would most likely have died since the killer is not a surgeon, he wouldn't know what he's doing.