This was a masterful piece of work that includes chair-gripping dialogue and breathtaking camera work. The psychological aspects of this film are layered and truly skilled. I am a tough critic when it comes to paranormal thrillers (if you can rope this movie into that genre), but the grit and elegance of this movie is remarkable. The dialogue is outstanding and really engaged me from the few frames to the very end. So well done. Thanks for the ride!