You should go out to your car and pull off a spark plug wire with your bare hand and no shoes , while its running. Tell me how it feels.
>>You should go out to your car and pull off a spark plug wire with your bare hand and no shoes , while its running. Tell me how it feels.<<
I used to race cars. My MSD ignitions would push 50,000 volts.
That's very different from 15.
Or touch a lawn mower spark plug while standing in damp grass....painfully numbing.
Spark is over 20000 volts - something on that order - generated by induction, not 12 volts.