Jeff, I'm not sure what to think as I live in PA also and I am nervous about bears. I have not had as close an encounter as you have had. I have had one bear encounter while in Allegheny National Forest. Hubby was driving my Astro Van at dusk, I was passenger, and a large black bear came up an embankment and into the road suddenly. We slowed to a near stop to not hit it, and it turned and ran straight for my van aggressively with it's mouth open making some kind of growling/grunting noise meant to scare us away, I presume. He put the van in reverse and backed up about 200 feet thinking to be submissive, and it slowed down, then continued across the road and up the hill on the other side.
I am glad we were in the van when we met that bear. It got as close as 25 feet away and it was as tall as the hood of the van at its shoulder. And it moved pretty fast, so I know I would never try to run from a bear. I do not move so fast anymore.
So, do you think that bear would have attacked that big van? An Astro is a good size. I am still puzzled why it ran at me and didn't just continue across the road when I stopped for it. It was autumn so I wasn't thinking it had cubs nearby, but I don't know enough about the life cycle of bears.
I can only guess it's cubs were there and about to cross the road, Perhaps they took off
out of fear

but I'm only going by the stories that I here that bears try to protect their Cubs.
Fact being, nobody on earth that I'm aware of is a dr. doolittle, or has had a real conversation with bears.
Bears push their Young out, Like Birds push their young out,
Why would they care what happens to them ?
I understand Instinct but even that appears to be short lived with animals.
I personally returned to the site of the bear I walked up on, with My Brother & Nephew
later that day. Being my Nephew was maybe 4, and My Brother perhaps more cautious,
they didn't exit the car. I did & tried to repeat my experience of walking up to it,
with a camera to get a pic.
But it was in my eye site much earlier and every movement it made,
caused me to believe I would end up chasing it off. The pic I snapped was with a Instant camera
In the shadows of trees & totally useless, considering I never got near as close.
My sister sends me pics on occasions when bears are at her back door.
She has had large bears & cubs on her back porch on occasion, & other then possible stuff knocked over
by their curiosity or clumsiness , nothing that appeared to be threatening.
anyway I would never walk up to a bear on purpose, Or suggest anyone do,
But if you really want it away, Blowing the horn, Waving arms, & Yelling loud at it,
are suggested remedies.
a Ranger on the News once said if a Bear comes at you and refuses to scare,
Punch it as hard as you can, square in the nose.
http://www.dailymail.co.uk/news/art...ues-dog-punching-massive-black-bear-FACE.html