Originally Posted by bluedaffy
Thanks for the quick response. If it had by chance nailed the distributor cap wouldn't the other cylinders not be firing as well?
No. You could have burned a trace in the cap from the dead post to the next closest ground (could be another post, or the distributor housing itself). Once the path is established, you have a carbon trace, and the spark energy follows that.
Probably just the wire, though.
Your wires aren't really wire, they are a carbon embedded thread-like material. They are fragile, and can be pulled apart by tugging on them, also they crack with age.