At the beginning, when they were hunting down that man, that cop got hit, It reminded me a little of 'A bullet runs through it'.
It's basically about these bunch of people who believe that nearly every person that holds any power what so ever is a serpant, an evil being. Shannon (I think she was called) bit Greg because she thought that he was a serpant that wanted to harm her. We even saw Brass with a snake's tongue. Mind control was also in use. When a man wanted to murder his wife, he uses Shannon (Chanel?) to kill her. He then fed her to a pig and mount it up!