There is a guy in Texas that has a flying saucer that hovers over his work bench. He built that for fun. One of the many other things he built uses special magnets and creates energy from them. With no other power source. I know people that have seen it. Smart people. It scared the poop out of them.
How smart could they be if they weren't trying to figure how to make a buck out of it?
That is, unless it was a hoax...