There was a lot of buzz surrounding James Wan's 'The Conjuring' going into this weekend. "Scariest movie of the year." "Best horror movie in a long time." And so on. But it paid off. 'The Conjuring' not only won the box office, it won the box office in a way that R-rated horror movies often don't. Between this and 'The Purge,' R-rated horror is officially back in a big way.