From the DVD's main menu, simply select 'up' on your remote control until you have highlighted the circle above the 'Stigmata' logo. Once that has been highlighted, simply push 'Enter'
This easter egg was generously submitted/corrected by spikey2000
While on the main menu press the "Up" arrow key on your remote to highlight the circle on the top of the Stigmata Logo. Press "Enter" and you will get to see a Pre-Production Animatic piece of the subway scene.
This easter egg was generously submitted/corrected by DougieB