Ver Cuevana 3. An intimate and inspirational portrait of Segway inventor, Dean Kamen, and his 15-year quest to solve the world's safe water crisis. SlingShot focuses on noted Segway inventor Dean Kamen and his work to solve the world's water crisis. An eccentric genius with a provocative world view, Kamen is an inspiration for future scientists. His inventions help people in need and ease suffering.