A HEI coil produces a minimum of 25,000 volts on open circuit, and I've seem scope patterns with a spark line over 50K. One of my classroom demonstrations used to be holding a spark plug in my hand with a HEI distributor running on a Sun tester, and let the students watch it fire a spark. Of course I made it a point not to touch the tester and get myself well grounded. Then I'd challenge the big, tough gangbangers to do the same thing! Very few of them took the bait, and the ones who did ended up doing some amusing dance moves!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!