There is a story about a group of experimenters who etched the sigil of
the elemental spirit of wind onto a printed circuit board. The board was
subjected to a high density fluctuating magnetic field (using various
frequencies until an effect was noted). After a few minutes of excitation,
the wind outside the building took on tomadic vetocities and the building
collapsed as the wind entity attempted to interphase with the resonator.
http://www.free-energy-info.com/Davidson.pdf