By 1996 my use of prosthetic legs was coming to a punishing finish because my bone infected stump couldn't take the wear and tear of prosthetics.
I read a story in a daily newspaper's once a week Science Digest, about a study of the human leg in motion.
They said it resembles a pogo stick, so I bought one, put it on, and haven't stopped walking since 1999.
(Well I actually engineered a prosthetic leg version and tried it on a few people, and they all liked it.)