This is a slow burn that toasts your emotions halfway through, deep-fries in the last 20 minutes, til it burns you at the beginning AND the end of the credits.
Go into this blindly. Ignore all comments on the web. Its a saddenning, creepy yet thought-provoking piece of art squeezed into the "mockumentary" genre.
I wouldn't have said this until I finished it all the say through. I walked into it thinking it could not scare me, and walked out not remembering why I felt that way.