Twist Endings
So...from numerous debates i've had film lovers both on and off line, i've come to find out that twist endings are often, for the most part, shun and looked upon as a form of "cop-out". I disagree, when done right, i think it heightens the movie experience. Take "The Others" and even cult favorites like "Camp Sleepaway". These, i felt, were instances of a well delivered twist. What are some horror film with twist, you thought were well executed or just memorable overall?