Wait, you did what?  Do you mean you grabbed a spark plug wire and removed it while the engine was running?  I think that jolt would be normal, more volts than I want in my hand.  You need to have the wires loosened (with engine off) and then have something non-conductive to remove them to test that way.

From: Jack R
Sent: Sunday, May 17, 2020 1:45 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Spark Plug Wire Shock

So, I tried pulling
spark plug wires to see if there was a cylinder missing.  When I pulled the
#3 wire, I received a jolt!