[Nov3]

2000 volts is the electrical potential breakpoint where human muscle breaks, then down requiring surgical debridement even though the muscle "looks good (but is not). The patients are stunned, but failure to do so results in gangrene.

That would mean everyone hit by a spark plug would be screwed. Thankfully that is not the case. Is there a current flow and time of exposure associated with the above comments.

[Diogenesis]

This is true.

What you are not considering is that te amount of damage depends upon the
the total power, and thus the current. You dont get
enough from the spark plug, except to reach the underlying muscle.