Most of us know ya don't mess with a bear.

(except for radio sales people from Denver. I attended a conference in Chicago some years back, and got stuck eating breakfast with a bunch of asshat sales reps from Denver, who had no idea what bear spray was, or why anyone would need it)

Sometimes, though, the bear messes with you. Such was the case in northern Wisconsin recently. It's a great story of "man tries to save dog, gets jumped by bear, so wife saves man with shotgun."