Craig, I don't think you get that the demonstrations show almost nothing, except that the second video you pointed to conclusively refutes the claim of no back-EMF, and quite visually, with the blinking of that neon bulb, which, as I recall, requires about 65 volts to initiate, the bulb then becomes low-resistance, dumping the back-EMF current (into the power source, I think, you can see the schematic provided) until the current falls below a keep-alive value, much lower. That bulb can dump a few watts of power, as I recall. Steorn used a diode, I believe, which will do the same thing, but at lower voltage, and not visibly.

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