"Fell while retreating."  People, when surprised by a bear, your atavistic instinct to RUN!!! will often kick in full force. Don't give in to it!  It will only aggravate the bear's own predatory instincts. Yell, wave your arms, look big. More importantly, always understand that when you are walking in Alaska, there may be a bear nearby.  If you are in an unpopulated area, sing, talk, whistle, make noise. Yell out "Hey, Bear!" once in a while, especially in high grass or dense woods.  You will be less likely to see Alaska's wildlife if you're letting them know you are near, but you will also be less likely to become lunch for Alaska's wildlife.