Borenstein wrote, edited, and directed the 2003 film Swordswallowers and Thin Men while a senior at Yale University. The film starred Peter Cellini, Zoe Kazan, Fran Kranz and Graham Norris, and featured Army Wives star Sally Pressman and Midnight's Children lead Satya Bhabha. The film won Best Feature and Best Screenplay at the New York Independent Film Festival and was named Best First Feature 2003 by Los Angeles Times critic Kevin Thomas.