Grylls willingly jumps into quicksand, icy lakes or roaring rapids to show how to survive a variety of circumstances.

Grylls愿意一头扎进流沙、冰湖或者咆哮的急流中，来表现在不同的环境中怎样生存。

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Last June, Wallenda captured the nation's attention during his 25-minute agonizing amble above the roaring rapids of the Niagara.

CNN: January 29, 2013 -- Updated 1437 GMT (2237 HKT)

We also climbed the rocks beside a roaring run of white-water rapids on rivers that have never been navigated.

CNN: ASIANOW - TIME Asia | 'There Was Method to My Madness'