I was puzzled by this film. I didn't understand why so much of it was out of focus, for example.
I also didn't find it at all scary, which puzzled me as it seemed to be getting advertised as a horror movie, indeed as a zombie movie, which it most certainly was not. They weren't fighting zombies, they were avoiding angry people.
I liked the rats in the tunnel, but frankly didn't understand why the rats were running. What did they have to fear from the angry people? I am thinking of the right movie, right? Wasn't there a swarm of rats that came running past in advance of the angry people chasing them?
Assuming that's true, it's an example of the inconsistent logic in the film that kept distracting me. In one scene, lighting a candle indoors brings a bad guy running within seconds, and in the next scene our heroes are blithely waving flashlights around in an unconcerned sort of manner. And the notion that a bicycle courier could outfight an entire detachment of military troops I found difficult to swallow. Or that he could flee the compound and run around outside without running afoul of bad guys, where other characters had not been so lucky. As these inconsistencies kept piling up, the film lost what appeal it had for me.
Generally I thought it had very few virtues (stellar performances being among those) and a great many flaws (the slapdash story and lack of much scariness being among those).