In the wee hours of June 15, the audience gathered at the Huily Island Harbour in Quanzhou,China, watched in awe as a giant balloon filled with 6,200 cubic meters of helium slowly made its way up. Attached to it was a 500-meter (1,640-feet) wire ladder. This of course, was no ordinary ladder but an art installation created by Chinese artist Cai Guo-Qiang.