'Buddy' director Casper Kelly and cast members Cristin Milioti, Delaney Quinn, Topher Grace and Keegan Michael-Key stopped by the THR Studio at Park City to chat about their new film that tells the story of children who trapped inside a kids' television show. Quinn revealed which part of filming the horror movie was the scariest for her. Plus, the cast opened up about their scariest filming experiences of all time, including the time an underwater stunt went wrong for Milioti.