A while back, there was a computer game that came with these measuring devices that you attached to your index fingers if I remember correctly. They measured the amount of electric current that went through you body. One could see the amount of electricity on the puter screen, supposedly it told you how stressed you are. The objective was to lower the resistance to the electric current and become fully relaxed.
Not sure about the voltage though, anything significant wouldn't relax me, that's for sure.
