Thrilling and quite a cliff-hanger! Viewers don't see a real and physical threat to this man but it seems he was always on his toes. There is overflowing paranoia and anxiety that one can't help but begin to feel paranoid, too. The images, sounds and over-all film scoring were all contributory to bring about that feeling of suspense and hair-raising thrill when there is an imminent sign of danger or repulsion. Well-executed scenes and shots, this is a must-watch!