i have had literally hundreds of runins with Black bears - only once did I think I was in trouble - I was not paying attention trying to slip up on deer in the edge of a cornfield. Slipping down the edge of the field I got within yards of a 250 range bear sitting like a dog looking at me popping his jaws, ears laid back. NOT COOL!
I am no expert by ny stretch of the imagination - would love to see a grizzly in the wild but they say a black bear is more of a predatory attack meaning to eat you, while a grizzly the majority of the time is just a whoop the snot outta ya cause ya spooked me attack. Either way your gonna get killed.
Most black bears I have run off easily, as soon as they saw me.
J