While deer hunting once, my brother was in a small ground blind next to a deer trail. As he was sitting there, a small black bear began coming up the trail, directly at him. He said it didn't seem to be following a scent, just seemed to be moseying up the trail, like it was going to work or something. Doug let it get to about 20 yards and then stood up and said "Hey!"
He said that bear swapped ends in an instant and started to head down the trail at top speed. While it was going it was, shall we say, trying to increase it's horsepower to weight ratio for more speed. My brother said that was proof that, this bear, poops in these woods at least.