'' The Nightmare '' is a 2015 American documentary film directed by Rodney Ascher . The film had its world premiere on January 26 , 2015 at the 2015 Sundance Film Festival and focuses on the topic of sleep paralysis . Ascher chose his subject because it had happened to him in the past
2015 Sundance Film Festival
2015 Sundance Film Festival
The Nightmare (2015 American film)