I think lumping this film into the horror genre proves that some people have a liberal description of what horror is. Though, granted, some of the best horror borrows from real life. And a story of obsession, stalking and sociopathy is certainly more real and believable than an invincible monster hunting after idiotic teens. With that said, I still don't think it's as much a horror film as much as it is a suspense/thriller with some comedic moments. This is what I would definitely call a slow-burner, but I do think that it leads to a very satisfying climax. The film is well-written, but I think what does push it over the top is Mark Duplass' performance. I've always thought that this guy was a very talented comedic actor, but this film does sort of give him the chance to branch a little bit out of the comedic roles. The film is also somewhat framed as a comedy, but it never comes at the expense of telling the story of this man, Josef, who's very clearly lying about everything that he's told Aaron and you're just trying to figure out what his motivation is and whether he's sincere on some of the things he says. For example, the last scene, in the park actually has one of the funniest scenes in the entire movie, yet it also probably one of the more disturbing moments in the entire film as well. I don't think many films can handle this so deftly in two completely separate scenes, much less in the same scene. Perhaps I may have been the only one who saw it this way, but the funny part of this scene really reminded me of Looney Tunes and how Elmer Fudd would sneak up on the 'unsuspecting' Bugs Bunny. But, I digress, Mark Duplass is excellent here, with a performance that pretty much brings out the most demented in him. It would almost have to with the nature of his character. Patrick Brice is also good, but he's almost like the straight man. He's just there to react to Josef's insanity. It's pretty much obvious that this film was made on an incredible small budget. Yet, because the film is so good, you never once actually think about that. And it's not like it even looks cheaply made or anything, it's really well-made for the small amount of money that it probably cost. So good on Brice and Duplass for making it work. The film doesn't ever drag, despite being a slow-burner, because you know that there's something strange about Josef from the moment you meet him. It's not like they wait a little bit before having Josef act strangely. Just the way he talks, the way he pretty much overshares stuff with Aaron that he probably shouldn't, his incredibly physical and sometimes affectionate manner, in that he hugs Aaron a lot for no apparent reason. But it really does start off innocently enough, before the layers of Josef's real personality start to peel back. It's all very well-written honestly. It's interesting to see witness this man's sort of downward spiral into mental instability. I really liked this movie, probably even more than I did when I finished the film. It's just a really damn good movie and I'd definitely recommend it. I don't think it's gonna be everyone's cup of tea, particularly with how slow it can be, despite not being very long. But I did find the film rewarding to watch if you have the patience to stick through it. Can't complain much.