The Mythbusters test the ancient myth that the Chinese put a man into space in the 15th century. Jamie and Adam also attempt to verify if there is anything as free energy. Grant, Kari, and Tory investigate whether a spinning ceiling fan can act as a decapitation machine. Science topics include the Law of Conservation of Energy, structural integrity, Newton’s Third Law of Motion, equal and opposite reactions, thrust, forces, flight stability, thrust vectoring, exhaust gas pressure, perpetual motion machines, phase changes, density, internal and external energy sources, center of mass, animal and human analogs, and rotational inertia. The episode can be found on either of the following DVD sets (they are identical).