As this video convincingly demonstrates, black bears are pretty timid, except when there are cubs nearby. I've actually never heard of an instance where a black bear attacked a human except in cases where hikers or some such unwittingly came close or especially, got between a mama bear and her cubs. I'm not saying it has never happened, I'm just saying I've never heard of such an instance. It's a good thing, too, that they are so timid. The black bear population around here is on the increase.
Bullseye