Independent films are a tricky lot, as often their budgets (or lack) become their downfall. Then there is a film like this, which is low budget to the point of no budget, but relies upon sharp character building and exploration to lay the groundwork for an excellent examination of paranoia and mental illness. This is an extraordinarily effective psychological thriller, based in no small part at how well written and acted the core relationship at this movie is presented. Onscreen friendships are often very difficult to write, but this film gets right so much of the dynamic between the two leads it elevates this movie to a greater whole. Along with taut writing and extremely well defined characters the director uses limited camera angles and sparing effects to create an intense aura of claustrophobia, paranoia and tension. There is never anything bombastic or gory in this film, it is for the most part a tight and restrained examination of mental issues and friendship, but it doesn't need showy locations, extensive budget, jump scares or unfettered gore to create a dark and intense experience.