Created by Reuben Brewer (Stanford University), PLEX are pneumatic boots that “raise you from 6 inches to 3 feet off the ground by toggling the belt-mounted controller.” Though not very practical, this project has potential. Video after the jump.
Some of them use a single combustion chamber that is fueled with diesel fuel to launch a person as they are running. So each of there steps are a few feet more apart, allowing the person to run much faster and further than with no running assist device
[via CycleSantaMonica]