American Ninja Warrior Sandy Zimmerman

American Ninja Warrior contestant, Sandy Zimmerman, has a business that revolves around elaborate obstacle courses.

Section:Gallery

Thu., July 5, 2018

American Ninja Warrior contestant Sandy Zimmerman leads the Little Ninjas class in her backyard, Thursday, June 28, 2018, in Spokane Wash.

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Isabel Barry, 10, of Medical Lake, Wash., launches and grabs the rope on The Rig challenge during the Little Ninjas class, Thursday, June 28, 2018.

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Luke McCollum, of Nine Mile Falls, Wash., assists his daughter Ezri, age 4, during a Little Ninjas class in Sandy Zimmerman's back yard, Thursday, June 28, 2018.

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Lindsey Zimmerman flies into the cargo net challenge at the Little Ninjas class, Thursday, June 28, 2018.

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Shean Hodge, 17, muscles his way along the peg-hole challenge, Thursday, June 28, 2018.

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American Ninja Warrior contestant Sandy Zimmerman encourages students in her Little Ninjas class to perform their best in her back yard, Thursday, June 28, 2018.

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Logan Smith, 8, makes an attempt to grab the ring on the Warped Wall during the Little Ninjas Class, Thursday, June 28, 2018.

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Riley Green attempts ball run during a Little Ninja class in Sandy Zimmerman's back yard, Thursday, June 28, 2018.

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