Simulating whole-body shake or convulsion

So I am a huge fan of hand-crank devices but I know they can be dangerous, and since I have a pretty powerful 8 Channel DIY stereostim unit, I thought why not simulate the effects as close as possible.

I have been trying to achive the so well known whole-body bouncing effect with a stereostim device. I would like to do so with only one pair of electrodes attached to the toes of both legs, but if someone has better options, this electrode config is not neccesary. I tried many frequencies, sine and sqr waves, modulations, but they seem like something is missing from them. Maybe a better On-Off cycle or other frequency, I am not sure.

Anyone ever achieved this feeling or something close to it?

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