Wow, that's amazing. That's one of those encounters where it would be most likely that the person telling the story wouldn't have a camera with them. I'm glad that guy did!

I would put my money on a buffalo over a grizzly any day...assuming it's healthy to begin with, of course. Bison can run at amazing speeds and they are really quite agile considering their massive size. We have a heard in the field behind our house. Really, really awe inspiring creatures. They look almost prehistoric in the early morning fog...