Equilibrium ala chick flick
Sure was a ton of greenery around the outside of the city instead of a wasteland like they had us to believe (look out the window of the train) so I don't know what the point was to try to get to the peninsula. Maybe they still would have been hunted down outside the city?
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My list of 1,000+ weird wild movies: http://www.imdb.com/list/ls053942167/