. >> reporter: like amapped -- amanda, jason is a tester. >> i put it into step. if i stop and don't go to the next position, it stops. i can go forward and lateral. there we go. >> test pilots like amanda and jason - how did they help you guys advance the technology? >> they helped immensely. everything is unpredictable once you introduce a human into the system. i remember being in the room with 13 ph.d. s, and they had a different idea of what would be the exact way to control something. without amanda and jason, we'd be at a standstill, because we couldn't test anything. >> reporter: exo pushed the boundaries, but the robot has limitations. it can only be used in a rehabilitative setting with a trained physiotherapist. >> are you ready? >> i'm ready. >> reporter: then there's the price tag, from $110,000-$140,000. exo bionics hopes food and drug price. >> i don't get enough of these heart to heart hugs. >> reporter: if you need another hug, i'm your man. >> all right. >> reporter: all right. . >> the emotional impact of this is obvious. other associate health