Did you know?... In Gulliver's Travels Jonathan Swift described the two moons of Mars, Phobos and Deimos, giving their exact size and speeds of rotation. He did this more that a hundred years before either moon was discovered!
Move the ring the length of the wire or risk shockigng your friend. Dependin gon what kind of a mood you're in, Shock your friend or risk moving the ring the length of the wire. Either way.