[FooBarBizBazz]

Pales in comparison to Soviet science ;-):

> the power comes from pistons that are filled with a fuel-air mixture, and fired by compression when the user puts his or her full body weight down into the boot

https://en.wikipedia.org/wiki/Rocket_boots

https://www.cnet.com/tech/tech-industry/these-gas-powered-bo...

[CaptainOfCoit]

Seems to be these ones, and bunch of more videos in the description too: https://www.youtube.com/watch?v=xJvmAXCh6Ak