In light of our conversation just prior to the commencement of my trip, you might find this interesting ;~)
Now if you could just train pitbulls to reliably bark or make other warning behaviors before they trounce on other animals less threatening than bears, you might have something.
Check out the latest post on pitbulls attacking a horse:
http://www.freerepublic.com/focus/f-chat/1659996/posts?page=455#455
Nice job! Way to keep your cool and take care of the situation at hand. You are great example for the rest of us to live up to.
How tall was the bear when he went up on his hind legs? Can't tell from the photo you posted?