ScreenCrave: Creating a great cinematic slasher/serial killer isn’t rocket science. Certain irreducible components must be accumulated—traits, if you will. Traits to explain why they don’t just stop hacking up teenagers and get a real job. Since teenagers are bratty, emotional little buggers to begin with, you don’t have to go overboard to explain why somebody would rather see them with a tamping post in their gullet. This usually means giving a slasher a traumatic childhood, and watching him/her go.