Surfing China's tidal bore the "Silver Dragon from matt wybenga on Vimeo.
The annual autumn "tidal bore" along the Qiantang River, 钱塘江, has been a known feature of Hangzhou for centuries but has attracted the world's surfers only in recent years. For some previous installments, see YouTube and Vimeo.
Thanks to Capt. DR and others who sent this on about a week ago, back when I was ignoring anything that arrived by email.
This article available online at:
http://www.theatlantic.com/international/archive/2011/11/cheerier-environmental-ish-news-from-china/247735/