I've had a black bear start to climb a tree I was in. I had a bow and arrows but was hunting deer.
I yelled and waved my arms around to scare it. It took a long look at me squinting it's eyes. Then reversed it's course and ambled on.
I probably could have shot it to protect myself, but it more surprised than anything. At the time though it got my heart thumping pretty good, lol.
Also had moose blocking a trail while backpacking on Isle Royal. I just backed off making a lot of noise and eventually the moose wandered off.
Had black bears sniffing my tent backpacking in the porkypine mountains.
Turns out the DNR was releasing problem bears in a popular backpacking area. Yup, brilliant, lol.
The bears fought each other trying to get food bags off a bear pole on that trip as well. The bear poles are a pole stuck in the ground and hooks at the top and another pole to use to position your food bag. The bears tried to shake the poles to get bags to fall.
Bears there learned if they charged backpackers, they'd drop their packs and run. So rangers gave out info and tips when you got a permit.
As long as I'm at it, I got high, on that trip knowing I wouldn't be drug tested in weeks. A friend gave me a couple joints. On my first break I lit one up, smoked a little. Then realized I didn't know what way to go, lol. I was next to a stream, and eventually remembered I was walking toward Lake Superior, lol.