Horror as a genre is fortunate in that it is able to succeed in simply being a roller-coaster of emotions. The audience is played like a piano, and when we begin a horror film, we expect to be unsettled and terrified by what we are about to witness. Unfortunately, making a genuinely scary film is a lot tougher than one might anticipate, in a surprisingly similar way to how difficult it is to make a good comedy. “[Rec]” is a Spanish horror film that is able to get into the action fast and from then on, fully succeed in creating varying degrees of terror and false sanctuary. Even if “[Rec]” doesn’t scare you, it is nigh on impossible to be truly bored by the brief affair.