Lisa Hughes wrote:

Not really. Touching a spark plug could feel pretty bad.

Spark plugs run on extremely high voltage. The 12v battery power is fed through
a step-up tranformer (known as a "coil" on most systems) to increase the voltage.
Voltage at the plug will be anywhere from 40,000 to 100,000 volts.

http://www.howstuffworks.com/ignition-system2.htm

George Patterson
Great discoveries are not announced with "Eureka!". What's usually said is
"Hummmmm... That's interesting...."