Sky Ladder: The Art of Cai Guo-Qiang (China, 2016) directed by Kevin Macdonald. Oscar-winning filmmaker Kevin Macdonald chronicles the making of the rip-across-the-sky fireworks of world-renowned contemporary artist Cai Guo-Qiang. This portrait of an artist’s process fuses family and history to Cai’s spectacularly expressive art of gunpowder pyrotechnics.