Benjamin Franklin was at an early hot air balloon launch (not the first one - that guy was killed by farmers when he landed). Anyway...the balloon goes up, and a person next to Franklin asks, "So, what good is this hot air balloon?" Franklin is said to have responded (in french), "What good is a newborn baby?"
So, in case anyone asks, "What good is a spinning egg?", you can check out this video, and know.
