What's more terrifying than a call coming from inside the house? The call coming from inside the theatre. That's the thought behind Last Call, an interactive horror film in which the main character calls a random audience member for help.
Moviegoers have always tried to help the ill-fated protagonists of horror movies, even knowing that the characters would get disembowelled regardless. "Run!" "Hide!" "Don't go down there!" In Last Call, a new German movie, the characters are finally willing to listen.
Audience members supply their mobile numbers at the beginning of the screening and, at one point into the movie, one is selected to receive a call from the character on screen. Voice recognition software listens for the moviegoer's commands and the unfolding of the story is based on their instructions. From the looks of things it seems like it's a "left" or "right", "stay" or "flee" type of thing, so your exhortations for the main character to take off her clothes will likely go unfulfilled.
13th Street, the company that developed the film, bills it as the "first interactive horror movie". It'll probably end up making things goofier than spookier, but they're right about one thing: putting the character's fate in the audience's control is a scary prospect. [Jawbone via Maria Popova