The subjective camera angle has been used ad infinitum in horror-thrillers, but debuting director Philip Claydon brings a refreshing sensibility to it by editing the shots on the beat of the excellent techno soundtrack by British band Carver. Clearly Claydon is a fan of Se7en, which this film successfully shares themes and atmosphere. Happily, the gore factor is minimal while suspense is high. The ending is shout-at-the-screen infuriating, but until then it's a stomach-tightening ride. Look for art rocker Rick Wakeman in an unflattering cameo as a inattentive hospital attendant.