New Zealander Jezza Williams, an international expedition guide, “made a mistake,” he allows. Diving into a pool at the bottom of an alpine canyon — a place he had swam many times before — he mistimed his move and hit his head on a rock. Now tetraplegic, Williams has reinvented himself — still an adventurer, albeit dependent on others. “To be rock bottom, spiritually, mentally, physically, you have a lot of time to reflect on what your life is about,” Williams says. “It humbles you massively.” But not for long. Williams founded the nonprofit Makingtrax, which initiates and facilitates the inclusion of persons with disabilities in adventure sports.