 During the shooting of the final sequence, in which Mike Church  (Kenneth Branagh) and Franklyn Madson (Derek Jacobi) are fighting,  Kenneth Branagh had insisted to Derek Jacobi to make sure that he  protect himself, during a moment when Madson is meant to have his  head slammed into a shelf. Derek Jacobi was meant to put his hands  under his head. Unfortunately, when it came to shoot the scene,  Derek Jacobi didnt manage to and hit his head on the shelf, having  a concussion for the next hour.