A pair of skis that have a core that can stiffen under stress, bend or chatter would be interesting too. Wearing exo legs while skiing may work for some, but I think would take away from the fun and challenge. I suppose it'd let a person ski faster, which in turn would warrant the variable core. Wouldn't want to fall though or would the exo legs act as a protective mechanism? The material in the core could also be in the exo legs, like a variable turbo-charger.