Hypothetically if the Human Centipede films were included they would be something like this probably
Layer 1: Human Centipede 3
Layer 2: Human Centipede 2
Layer 3: Human Centipede 1
But is Rob Zombies Halloween 2 set in 2008 or 2009 because at the beginning it says one year later while people are putting the film in 2009 so which one is it?