I've had a huge boar grizz charge us out sheep hunting. He had a bull elk buried and was guarding it viciously. When we happened on him at 150 yards it was cool (we didn't know he had a kill). We has the wind and he didn't know we were there. When the wind changed, that's when it got ugly fast. He stood up on his hind legs, checked us out, puffed his hair up like a porcupine, and charged. At that point, out came the rifles, as we had nowhere to go. He stopped at 100 yards and again came another 50 yards. At 50 yards, I felt very small, and had little faith we'd be able to stop him (judging by the speed he'd covered the first 100 yards). We put the cross hairs on him and yelled at him. If he made one more step in our direction, we planned on firing. He eventually walked off.
This kill was about .75 mile from our camp, whîch didn't leave us with a warm fuzzy feeling, but he left us alone.
Bluff charges, but WOW, he gets my nod for an Oscar.
On another note, we had a problem bear up north a couple of years ago. She (a VERY old sow) was causing a lot of problems around camp. I sprayed her directly in the face with bear spray at about 7 yards with the wind at my back. She had next to no reaction and continued on with her activities. Even with the wind at my back, it took MY breath away and I spent the rest of the afternoon with my face and eyes burning.
I won't be banking on bear spray to stop a charging bear.
