Filmmakers Reveal How They Made a Rad Ski Movie With Only an iPhone

In the past week, Teton Gravity Research put out Valhalla Transmissions, a short ski edit that, at first brush, looked like the production company’s bread and butter. It saw pros Kai Jones and Sammy Carlson throwing down, hucking flips and spins as they cut through fresh snow in the backcountry. But this wasn’t quite your usual movie. TGR shot the entire thing on an iPhone 17 Pro, which was released last September. And the novel idea (the creators of 28 Years Later&nbs