Well i would expect the skin to interact with the electrostatic field but not very much with the electromagnetic field, and i thought this was a magnetic pulser not an electrostatic generator/pulser.
I havent yet gotten to simulate the circuit but i'll try to get to that soon so we can take a look at the operation. If it does in fact work then we would be able to discover the mechanism that shuts off the SCR, and what part of the circuit controls that the most.