Select the "Special Features" option at the main menu. 
Select the "Behind The Scenes" option and advance to 
the second screen. Highlight the "Stills" picture, then 
press Left to display a photograph of a train. 
Press Enter to watch a segment featuring railroads 
used in the movie. 

In the Region 4 version, select the "Extra Features" 
option at the main menu. Highlight the "Main Menu" 
option and press Right to highlight a gun. 
Press Enter to watch a the railroad segment.