Meet Keahi Seymor, the inventor of the ‘Bionic Boot.’ As a child, Seymour was fascinated by what appeared to be the effortless speed and agility of ostriches which can reach speeds of 40mph (70 km/h), covering up to 16ft (5 metres) in a single stride. Now the San Francisco-based inventor has created a prototype gadget that he claims will allow humans to experience what it’s like to reach these incredible speeds.