Violence: In "After Earth," liens kill humans, stabbing them with their sharp limbs. Aliens place humans in trees by impaling them. Multiple animals attack a human while he is searching for part of his ship. There is a hand-to-hand fight between an alien and a human.
Danger: Aliens can smell fear and follow it to kill humans. An asteroid storm hits a spaceship. Kitai (Jaden Smith) must survive an extremely harsh planet while overcoming his phobia of aliens.
Scary images: Memories of a sister being killed by an alien. Dead baboons piled up with limbs removed. Humans used as bait in trees. Human bodies strewn about crashed ship.
Shawn O'Neill is the Family Man Movie Reviewer. You can see his reviews at http://familymanmovieblog.blogspot.com/.