This is Sky Ladder, a pyrotechnic display created by Chinese artist Cai Guoqiang to celebrate his grandmother's 100th birthday. It was achieved by igniting a gunpowder-covered wire ladder danging some 500-meters (~1,640-feet) from a weather balloon. The result is spectacular, and I'm surprised nobody tried to climb it. Because I would have tried to climb it. "Haha -- getting into heaven the easy way, suckers!" I imagine myself yelling to the crowd before plummeting to my death and going straight to hell.
Hit the jump for several videos of the display.
Thanks to Lindsey P, who agrees the best fireworks are the ones you set off yourself because danger makes everything better.