After witnessing a terrible independent film at a festival, a group of four struggling writers and actors decide they could do better and head to Big Bear, leaving that night. Although their struggle to come up with a plot is significant, it’s nothing compared to the sack-headed threat lurking outside the cabin’s windows. Equal parts slasher and love…square, this sometimes clunky film about struggling filmmakers is a real charmer. The naturalistic performances from mumblecore muses Steve Zissis and Greta Gerwig (while not faultless), glow, even this early in their careers. Directors Mark & Jay Duplass’s process seems more polished. Stronger cinematography that at the same time maintains an improvised feeling. At the end of the road, Baghead is more shocking than you’d expect.