Squirrel with a Sense of Humor?

This squirrel seemed to have a sense of humor, plus he was one brave squirrel. The dogs saw him run up the tree, and then he stopped what he was doing and sassed back at them. The more I took pictures, the more I was convinced that he wanted to talk to the dogs. They couldn't reach him since he was about 10 feet up in the tree and safely out of harms way. But he never took his eyes off us!