All the books tell you that if the grizzly comes for you, on no account should you run. This is the sort of advice you get from someone who is sitting at a keyboard when he gives it. Take it from me, if you are in an open space with no weapons and a grizzly comes for you, run. You may as well. If nothing else, it will give you something to do with the last seven seconds of your life. (The illustrious Bill Bryson)