Whenever someone compiles a list of The Scariest Films Of All Time, they always mention the same movies: Psycho, Jaws, The Shining, The Evil Dead, A Nightmare On Elm Street, The Ring, Insidious etc. There is, as we all know, no best of anything, but if these lists are to have a purpose, it should be to introduce readers to a broader variety of films rather than echo the opinions of others. So lets assume youve seen those films and move on, okay? A good horror movie doesnt want to reassure the viewer but sneak up on them unawares and scare the bejesus out of them, to unsettle them by giving some kind of insight into the things that lurk in the darkness. One of the most unsettling moments of the last 20 years occurs not in a horror film but in Todd Solondzs Happiness (1998), when kindly neighbour Bill Maplewood (Dylan Baker) allows his sons friend to sleep over so he can drug the boy and abuse him. Which kind of knocks Insidious and Paranormal Activity into a cocked hat, dont you think? Each of the following films was chosen for their ability to unsettle an audience. You might care for them, you might not, but you wont come out of them thinking, Meh, what else is on?