I know the answer. I get killed off because either:
*) I AM the Monster/Vampire/Zombie/Poultergeist/Alien/Serial Killer
Or:
*) The good guys mistake ME for the Monster and eliminate me in hopes of saving their own skins. With the possible tragic consequence that if they had let me live, I'd have given them the means to save everybody and nobody would have to die. So they all die for their paranoid bloodlust.
Really, I hate horror movies.
FP
*) I AM the Monster/Vampire/Zombie/Poultergeist/Alien/Serial Killer
Or:
*) The good guys mistake ME for the Monster and eliminate me in hopes of saving their own skins. With the possible tragic consequence that if they had let me live, I'd have given them the means to save everybody and nobody would have to die. So they all die for their paranoid bloodlust.
Really, I hate horror movies.
FP