It's simple OHM's law

I=E/R

120v/10,000 ohms (roughly your body inpedance) = 12ma

It all has to do with the electrical impulses from the heart. If 10ma is flowing = and opposite to the electrical impulse from the heart it can stop it from beating.

If you are unfortunate enough to come in contact with 18,000volts....See YA...

18,000volts/10,000ohms = 1.8amps now we are cooking flesh.

[This message has been edited by tsolanto (edited 09-15-2002).]