Yesterday I had this solar panel installed on my leg. It collects energy from the sun and powers a heater that provides my entire body with heat all day long.
It has also transformed my ankle from a collection of muscles, tendons, and bones that can move at will into solid mass. Since last night, I've thought of my foot at "club foot". While cleaning my room yesterday, I realized that I was using my club foot to slide things around on the floor. So, along with heating my body, it's also a useful tool. How cool is that?