 The sequence of the train transporting the big guns was expanded  with additional footage shot after principal photography. The extra  footage consisted of POV shots from the front of the train and shot  at a lower frame rate to make the train appear to be traveling very  fast around the curves in the track. This was done to show off the  Cinerama process in much the same way as the famous rollercoaster  sequence in _This Is Cinerama (1952)_ (qv). Much of this footage was  removed from the general release version.