Paul Stutzman, who biked a crossed the United States says:

I was miles from any town, complaining to myself about the wind and the heat, when I saw him coming toward me on the opposite shoulder of the highway. He was in a motorized wheelchair, a breathing tube in his throat and an oxygen tank lying across his legs. A brace held his head and neck immobile, and his arms were strapped tightly to the chair. His body appeared locked in paralysis except for the fingers of his left hand, which lay on a toggle switch that operated the chair.