The whole Super 35 film was scanned by a Spirit Datacine at "2K" resolution (1920*1459 actual pixels, over sampled by 1/15 to true 2K) and digitally color-graded at Cinesite LA. The film was then digitally squeezed and output by Cineon Lightning laser recorders to anamorphic inter-negatives for release printing.
When Hart (Colin Farrell) sneaks out of the barracks near the end of the movie he hides from two passing guards. As the guards pass they are speaking German. What they are saying translates to: "My dog has no nose" "How does he smell?" "Terrible."
Alfonso Cuarón was once on board to direct this film. However he stepped away from the director's chair and did Y tu mamá también (2001) instead.
The song being played by the band during the musical is "Der Fuehrer"s Face", an Academy Award winning anti-Nazi song by Spike Jones and His City Slickers that used flatulence-resembling sound effects.