Five people move in tandem down a trail as it gets steeper and narrower than the bright orange metal frame connecting them.
This trail, popular with Bend, Oregon, families, is a testing ground for inventor Geoff Babb, and the stakes couldn’t be higher.
One miscalculation about how to navigate the tight squeeze of boulders, and he could topple over the edge toward an ice-cold river below. But, that’s not what worries Babb, who hasn’t walked since a stroke 14 years ago.