I live on the Avalon Peninsula of Newfoundland and bears are few and far between in my little section of the province. In fact, we have more Polar Bears show up than Black Bears...the blackies generally prefer the woods of Central/northern/west coast and there are few to be found further east than Come-By-Chance.
End result is that my buddies and I never had to learn to be bear smart!

Anyhow, we were out hunting Area 64 - Middle Ridge for Caribou and Moose. We set up camp next to the Nor' West Gander, just beyond this old steel bridge the logging companies used 40-50 years ago. I had tags for a Caribou as did my brother and my dad had Moose tags. The day before I had my run-in with Mr. Bear I'd shot two ruffed grouse for the stew pot. My dad, instead of disposing of the offal properly, or at least throwing it into the river, dropped it at the edge of our camp site!
The next day my brother and I were successful in taking a couple of book class Caribou.

While they were retreiving the quarters from across the river, I stayed back in camp to construct a tripod rack to hold the meat. For some reason, we'd hit a heat wave and temps were warm enough for T-shirts and shorts, which was what I was wearing, along with sandals. There were several clumps of alders growing up in the camp which I needed to clear to set up the tripod. So I grabbed the old rusty machete we kept in the truck tool box. Walked about 30-40 feet from the old converted school bus camper we were staying in and started to swing.
Just then I heard a snuffling grunt...I looked to my right and there, staring back at me was the biggest friggin' Black Bear I'd ever seen!

He was the size of a small grizzly...and for anyone who know's bear hunting in Newfoundland, that's no exaggeration. We have some of the biggest black bears in the World (due mostly to plentiful food sources, lots of room, low hunting pressure and no natural predators).
The big Black was enjoying a meal of ruffed grouse innards and didn't seem too concerned about me. However, he did stop and jerk his head toward me. We eyed each other for what seemed like hours...in my mind all I remember thinking was oh $hit, oh $hit, oh $hit, oh $hit....

Finally, I began to slowly back away from the big old boar. He grunted at me and gave the ground a little swipe. All I had to defend myself was the $10.00 Canadian Tire Machete. I wasn't too hopeful of coming out on top so armed!
The bear left his meal and walked around the clump of alders and watched me back away. My rifle was safely stored in its gun case back in the camper! I got about 10 feet from the bus and finally my nerve broke and I made a dash for the camper. I made it and grabbed the rifle and quickly loaded it. Now the bear was in trouble!
I exited the bus and the bear was still standing in the middle of the clearing. I raised the rifle and took aim at him, but couldn't drop the hammer. I was mesmerized by his size and majesty....besides, I didn't have tags and there would probably be a lot of flack from the wardens if I did it, while the only reason the bear had found our camp was because of the free meal we'd offered. So I yelled at him and fired a couple of rounds to scare him off. He took off like the devil himself was after him!
Shortly thereafter the guys returned with the first load of meat. We got the tripods finished and the rest of the meat hung. We later ran into a native trapper, who lived year round in the area, and told him about the bear. He had a license and very happily made a snare set near our camp. It offered us a little protection, as well, since it wouldn't take much for Mr. Bear to sneak back and make off with a haunch of caribou! Two days later the trapper got him, it was the same bear! IIRC, he weighed about 680lbs, according to the old fisheries scales the guy had. It took all four of us to get him onto the trailer and we had to use the bike winch to hoist him up high enough to get him on the scales. What a beast!
We returned the next year with bear licenses,this time in hopes of taking a trophy bear like that, but we had to settle for a couple of mature 450lb boars. Both skulls green scored 201/4". Unfortunately, neighbourhood dogs made off with mine, stealing it out of the apple tree where I had it hung to dry after we got home! Dirty buggers, cost me my Big Bruins hat!

That was the closest I ever came to getting charged and I sure don't want to repeat it! After, what did strike me was how much safer I'd have been if I'd been permitted to carry my Ruger Super Blackhawk .44 Magnum holstered for self-defense. I'd still been able to do my work, without an 8lb rifle getting in the way.