The Strangers
A couple with interpersonal issues honeymoon up at a cozy house in the forest, but their trip gets interrupted by a group of masked strangers. The horrific acts of violence in this film feel unwarranted, abstract, and nonsensical. That's really what makes the whole thing terrifying.
Audition
A man named Aoyama wants to start dating again, but it won't be easy. He eventually meets a lovely young lady who has a bizarre fascination with all things macabre. She starts out sweet and submissive, but as the movie plods on, Aoyama discovers that he may have bitten off more than he could chew.