Staying with the medical theme, this absurd miracle would usher in an era where our body parts were capable of independent action even when severed from our body. Why stop with just legs? Why not send your head and hand to work to answer the phone while the rest of you goes to the gym? Or send your mouth out to eat a hoagie. Mail your dong across the country to get with your long-distance girlfriend! It’s a whole world of possibilities. Alas, if you cut off your leg you’ll just bleed to death and fall over.