In the Basement (2014)
An Austrian documentary flick; about people, hanging out in their basements, and giving into very perverse obsessions (and demented fetishes). The movie was directed by Ulrich Seidl, and it was written by Seidl and Veronika Franz.
The film starts out somewhat normal; as it just follows odd people around, doing strange things in their basements. As it goes on, though, the documentary gets weirder and weirder. I wanted to stop watching it, several times, but persisted (so I could do this review). It's only 82 minutes long, but it seems a lot longer (and it's a very painful 82 minutes)!
The movie is one of those films, I really wish I could unwatch. It's one of the most disturbing experiences, I've ever had (watching a film of any kind); and I love movies! (IMDB Hellmant)