Professional skateboarder Sean Malto's documentary, called MALTO, was shot entirely on an iPhone. Ghost Digital Cinema released behind-the-scenes footage from the documentary (via MacStories), detailing how they used professional lenses and a gimbal attached to an iPhone and a $10 FiLMiC Pro app to capture the visuals.
Check out the documentary above, and view the behind-the-scenes footage from the video below. It is remarkable how the video turned out considering it was shot entirely on an iPhone. Then again, this isn't the first time the iPhone has been used in such a setting.