Documentary shines spotlight on Olympic 'footprints' artist

Cai Guo-qiang is probably best known for designing the 2008 Olympic Games "giant footprints", 29 such-shaped fireworks lighting up the Beijing sky to celebrate the opening ceremony. The spectacle was watched by 2 billion people across the world. But this is not his only claim to fame.

In a semi-biographical documentary film Sky Ladder: The Art of Cai Guo-qiang, the 59-year-old artist reveals his dream project.

In a fishing village nestled in his hometown Quanzhou, in Fujian province, Cai ignites a 500-meter-long ladder made of rope and gunpowder. The ladder shimmers in the sky when it is carried high by a giant hot air balloon.