Life ‘First mother ever to hit a buzzer!’ 42-year-old mom dominates ‘American Ninja Warrior’ June 25, 2019 Amy Haneline, USA TODAY Comments Off on ‘First mother ever to hit a buzzer!’ 42-year-old mom dominates ‘American Ninja Warrior’ Sandy Zimmerman, a 42-year-old mom of three, just made herstory when she climbed the Warped Wall and hit the buzzer on "American Ninja Warrior."