When the victims are being chased by the murderers and it causes the victims (Kate Beckinsale, Luke Wilson) again through the underground tunnels into the motel office hidden door on the floor. Luke Wilson is holding a torch with one hand when he's opening the little door slowly to peek through, when the camera view changes to the office you can clearly see he pushing the door open with both hands! No torch. Then when camera switches to tunnel taa daa he's still holding the torch.