I think devices like these always capture the imagination. Cold fusion and room temperature superconductivity are two others that come to mind. The second law of thermodynamics prohibits perpetual motion or 100% efficiency. One of the tenants of science is being able to reproduce or duplicate an experiment or device. That is how cold fusion and room temperature superconductivity were found to be non existent (up to now). If this fellow is legitimate, he can provide plans or instructions to make a similar device. Getting a patent for such a device is difficult because patent officers will not allow perpetual motion devices (because of the second law of thermodynamics). Magnets and magnetic fields have long been a 'source' for such devices, including the earth's magnetic field. However, none have 'panned out' to create a new era of scientific knowledge and discovery. There is a reason some scientific principles are declared 'laws', that is because they are true 100% of the time (i.e. cannot be violated). I wish him luck and can appreciate his enthusiasm and creativity.