The Bionic Boots
"Bartender by night, maker and tinkerer by day, Keahi Seymour has invented a transport design that uses the energy created by running naturally and amplifies his run speed up to 25 mph. The spring-loaded boots, made of speargun springs, carbon fiber and metal isn’t a vision of the future, it is the future."
Youtube: https://www.youtube.com/channel/UCiAPcM4MOsRhv7kcR6Ci5JA