After capturing the killer Cpl. Billy Critchley, Henno, Jamie and the police are in a helicopter when Henno grabs Critchley and hangs him out the helicopter doors to force a confession. The first time this happens Critchley does not have his head covered but when the camera angle swaps to look down out of the doors you clearly see Cpl. Critchley with the sack over his head, before the camera swaps back to looking up to show him again without his head covered.