5 pound dog chases a black bear

[Catherine]

A black bear got into a BC family's garbage can. The family's 5 pound Yorkie chihuahua mix chased the bear away. 
He even nipped at the bear. The bear turned and left.

https://www.ctvnews.ca/vancouver/article...-backyard/

The bear would have been over 150 pounds. The dog was 5 pounds. I suspect the bear's feet each weighed more than 5 pounds.
The bear could have stepped on the dog and that would have been it, but the bear turned and walked away.
I am glad it ended well, but I wonder why the bear left. Lincoln is a brave little dog, but he certainly doesn't understand how small he is.
Good thing the bear was nice and didn't want trouble.