 The real ending, which we are told in the film that the footage was   destroyed and then are presented a dramatization of the events. The real   ending is, when presented with the choice of killing one another, Jeff and   Dawn put the guns down, run out of the theatre, were they meet a crowd of   disgruntled fans. The fans give chase after them and, after catching them   entering their SUV, begin beating them, presumably to death. This explains   why, at the end of the film, Doria is proclaiming that shes been framed and   why Jeff survived. 