This was probably the best scary movie I've seen in a very long time. It wasn't reliant on gore. It wasn't reliant on jump scares. It took a very simple concept and made it absolutely terrifying.
The whole movie was unsettling for me and I found myself watching the background more than the movie itself trying to find the creature.
Anyway it was unreal and I'd love to hear of more movies that come close to it.
Using more than gore and jumps to be scary.