If everyone living or working in precariously elevated positions could shoot Spidey-silk from their wrists in case of an unexpected fall, there would be no need for the Wizard rapid-descender concept from UK design shop HJC. But a sleek Dyson-esque backpack housing up to 250 meters of woven liquid polyester that can hold you and two tons worth of distressed damsels is a fair second option. If this thing comes to market, I think I’ve found my new treehouse-egress solution. [Yanko Design]