The Horror Challenge,
A formidable antagonist.
I think I'll have to go for the killers in The Strangers. Everything they did was with good thinking. Somebody wants to take the phone? Ahh, too bad! It just went missing! Let's drive away with the car! What did you say? Ah, I just set it on fire, what a shame. They where a step ahead of them, every time. And the way they scared them was excellent, starting with a lot of mind fucking before starting to attack. And the mind fuck is what scares you the most, because they seem to be everywhere around the house, yet you can't see them.