Ju-On: The Grudge (2002)

Non-linearity in horror film seems like a huge gamble. Its a very straight forward genre. You go from point a to point b, as terrifyingly as possible. The Grudge succeeds with its non-linear storytelling by doing exactly that, going from point a to point b, but stopping at c and z along the way.
The sequel to a sequel to a direct-to-video horror film, The Grudge exists in a certain amount of Ju-On tradition. When a volunteer welfare worker makes a routine visit to an elderly patient in a seemingly ordinary house, she stumbles into an old, and deadly, series of murders and disappearances. The story unravels from the point of view of the people she encounters as well as the people the house encounters, leading to a climax that unites the story threads.
Ju-On: The Grudge is a slog. That's not to say that its not good, or not worth watching, because it very definitely is. But it suffers from some severe pacing issues, due to the non-linear nature of its storytelling. Some of the stories told in this film are just not worth telling. Some of the more boring segments are steeped in a level of Japanese culture and religion that is completely foreign, and to a point perplexing, to me, but might not be to you! There are some awesome shots in the film, a near complete lack of jump scares, and some legitimately terrifying moments. You can see how influential this film was on 00s horror in its aesthetics and its got worth in that alone.