HEI in Mopar ECU casing

If you are "grounded', it means there is a potential current path from the source, through you, and to the ground. Sounds like a recipe for electrocution.

That's right.
Actually the phrase should be that electricity will take ALL paths to ground.

I had some idiot electrician tell me that you can't get shocked by touching (grounding yourself) to a metal faucet if you have PVC plumbing because the PVC does not conduct electricity and neither does water.
He said that the metal plumbing is what conducts the electricity.

I laughed and asked him if he wanted to do an experiment.