And on the eighth day, we got apps. Director Darren Aronofsky's new film Noah is, of course, about the Biblical flood so massive it required one man to build an ark. Bringing such an apocalyptic deluge to the big screen was no easy task, and it required the special effects team behind the movie to, well, make it rain. In the video above, FXguide's Mike Seymour details how the crew controlled their giant custom storm machine—a rig that poured down 5,000 gallons per minute. How did they do it? A single iPad app.