Kaylene Kau’s prosthetic arm is either a sweet modern update of the old-fashioned pirate’s hook, or a terrifying device that will turn its wearer into a Cthuloid-human mongrel. I favor the former, if only because I want to sleep at night.

The prosthesis is not designed to be a prehensile limb, but instead it’s an assistive appendage for the good arm. A simple motor drives two cables inside the tentacle, and the wearer controls it with a pair of switches