 He started with a really simple premise. The director, Osgood Perkins, started with the premise that a mother can create a narrative for her kid about how the world works. And then he turned that simple premise into a total nightmare of a terrifying film called Long Legs. A lot of people are calling this the scariest movie of the year. Osgood, or Oz, will tell you how his own parents influenced the movie and about working with Nicolas Cage, whose mom used to scare him, like really truly scare him.