The average American bonus DVD is filled with praise for everyone & is basically a lovefest about how awesome everyone was & they’ll be friends forever! Matters of Life and Death (City of Life and Death: Bonus Material) is about the challenges of dealing with bureaucracy of investors & government, internal corruption within the production team, production & talent disagreements with the occasional patriotic due paid to Mao as inspiration to keep going (remember it is a film that was made in China & an artist’s life can be ruined without government approval). Basically the director got extremely sick & all actors were traumatized.