Crutches. In a thousand years their design hasn't fundamentally changed. And for something as minor as a sprained ankle or broken foot, the Freedom Leg looks like a welcome alternative.
A light, 1kg exoskeleton, the Freedom Leg moves all of your body weight from your injured foot to the prosthesis frame and your upper leg, meaning that you can walk pretty much like you normally would while you heal up. And while I welcome resident doctors to list all of this product's flaws in the comments, to my pea brain, the idea seems so obvious and simple that it just might work. [Forward Mobility via medGadget via OhGizmo!]