Just throw something heavy to your neighbor. Human instinct is to catch it. While they stand there holding my backpack, I'd jet.
My mother used to know a man who once lost a girlfriend to bear attack. Well, actually... they were camping and he awoke to some animal coming into the tent. His instinct was to thrust her into slavering jaws of the beast and effect his escape. It turned out to be their (large) dog. I would really have liked to have been a fly on the wall for the conversation that followed. The drive home must have been awkward. Still, better safe than sorry, I guess.
I spent some time in grizzly country as a kid, and the advice I got was to play dead. I actually met a man who had done just that and survived. The bear flipped him over a few times. He had serious scars, and liked showing them off to impressionable children. It must take quite a bit of composure to keep playing dead at that point.