I LOVE horror films!
I also love horror quotes, that's why I can't narrow it down, so:
"What's the matter kid? Don't you like clowns? Why? Don't we make you laugh? Aren't we f**kin funny? You best come up with an answer cuz I'm gonna come back here and check on you and your momma. If you ain't got a reason why you hate clowns, I'm gonna kill your whole f**kin family." - Captain Spalding in Devil's Rejects
"We're gonna get you. We're gonna get you. Not another peep. Time to go to sleep." - Evil Dead