Related Program: The Spark Item 1: How To Safely Go Down a 40-Foot Waterfall By Martha Woodroof • Jan 25, 2013 Related Program: The Spark ShareTwitter Facebook Google+ Email View Slideshow 1 of 2 View Slideshow 2 of 2 Item 2: How to rescue those who failed to go down the 40-foot waterfall safely. The "Canoe Guru," Eli Helbert, joins us. His website is TheCanoeGuru.com and here is some YouTube material. Listen Listening... / 22:15 (webtext: tw) Related Content Kate Kessler 4 years ago Shoe, Hiking Boot Fixer David Young 3 years ago How On Earth Does This Not Sink? 3 years ago Hands Off The Speleothems 3 years ago Canine Engineer Bill Fawcett 2 years ago View the discussion thread.