Nightmare Fuel / Eden Lake

  • What makes the film effective is its total plausibility in today's world.
  • Adam's high-pitched screams as he's set on fire off-screen. Worse yet, we get a brief shot not long after from far away of him still walking around with his head on fire.
  • Similar to above, Jenny's screams as she's dragged into the shower by Brett's father to be killed, and Brett's emotionless stare into the mirror afterwards.
http://tvtropes.org/pmwiki/pmwiki.php/NightmareFuel/EdenLake