As the scene opens to a post-apocalyptic world of desolation, dust and debris, I thought to myself, "uh-oh, this is going to be a downer."  It is filmed in black and white with sepia tones to give it a "gritty" look.   At first, it seemed like the introduction is long and drawn out but in retrospect perhaps we were allowed a small peek at the lonely life of Walker, who at first appears to be the only man who has survived a global disaster.