Falling loosely, but firmly, into the horror genre is Lars (“Melancholia”) von Trier’s dense psychological mind game which begins poetically, but slowly builds to one of the most genuinely creepy finales in any movie of recent memory. Traumatized by the death of their young child, a couple retreats to a cabin in the woods to work through their grief, only to be confronted by forces unknown. To say it’s not as typical as it sounds is to call the Grand Canyon a little hole. Be warned, however, that at least one scene will have male viewers crossing their legs and wincing, followed soon after by an equally leg-crossing scene for the ladies. Keep that in mind. Have a look, but don’t expect to forget it any time soon.