Suspenseful and clever!  I like the unique idea of how the haunting was made towards the girl.  Commendable cinematography and the suspense factor was clearly utilized  that will keep the  viewers glued to their seats.  The subtlety  of it all makes for a  very exciting film and  the final scene, with the girl continuing to count on  beyond ten was successful in  leaving viewers mortified and  in shock, despite the absence of further visuals and with only Katie's voice as she continues to count, was heard.  Definitely a must-watch.