Aside from seeing the Jaws trailer on a large screen in a movie theater...when I was five...I don't recall any Horror movie giving me nightmares. Certainly not panic attacks, nor PTSD.
Left on the cutting room floor because it didn't look convincing. As a still, it's pure nightmare fuel.
Purely as an exercise in aesthetics, the film could be appreciated, but it was tough to get through for the reasons mentioned above. This is the kind of arthouse movie I can admire without really enjoying.
The first half was a tough slog, an eye-rolling, head-scratching endurance test. The second half redeemed itself beautifully, albeit in nightmarish, ultra-violent fashion.
She began repeating the motion of bringing her hands together, then slowly pulling them apart, working the necklace as if it were a garrote she intended to strangle us with. And we were certain that's how she meant to use it.