Glassing a Dall sheep on an opposite hillside, a sow with a cub moved in on us. We didn't see them until they were about 70 yards off.
She took us instantly and charged three times. My buddy dropped the camera so he could throw rocks at her, but it was still filming so the sounds are hilarious. At least they are now- not so much at the time.
Finally got a copy of the video so I posted that part on youtube. Check it out- the audio cracks me up everytime.

http://www.youtube.com/watch?v=_kr5I...eature=related