<ul><li>Danny Boyle, the director of '28 Years Later,' discussed the use of iPhones in detail for the film.</li><li>The film used three special rigs for iPhone sequences: one for eight cameras, another with 10 cameras, and a 20-camera rig.</li><li>The 20-iPhone rig was described as a 'poor man’s bullet time' visual effect and was used for violent scenes to emphasize their effect.</li><li>In addition to iPhones, drones, cameras attached to actors, and even farm animals were used to achieve an immersive feel for the film's widescreen aspect ratio.</li></ul>

'28 Years Later' used 20 iPhones in tandem for some wild shots

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