Horror, theoretically, shouldn't be big business. By their very gory, visceral nature, horror movies alienate a great number of the movie-going population. A lot of folk can’t stomach them. Parents can’t take their kids to see them. The elderly don’t generally like them. They frequently have low budgets and no-name actors, bucking the idea that dictates audiences will only pay for movie stars and explosions. The last thirty or so years have seen a depressing number of paint-by-numbers sequels and terrible remakes. They shouldn't work.