He explains that a bit in the 31 doc, I mean he likes that sorta filming, I mean he did in the Halloween remake, it's a cool effect but after awhile, it does get tiring, it's better than a straight shooting shot, I mean the scene in US when the main character fights her doppleganger underground, the way that scene was filmed, I'd sorta would have liked that in 31 if I was to edit you know, as for Lords Of Salem, you'd have to listen to his commentary while watching the movie, he explains certain things that was going during filming and what certain scenes mean, he had explained there was scenes cut from the film that would have explain the plot, if you waited in the credits, there's a part where it sounds like a news radio talks about what happened to theater, but it's best to hear rob explain it I guess.