2 examples:

A Chihuahua on my route to work, when he's out (unfenced, unleashed, I'll roll his feet if he gets too close), likes to chase me aggressively for the length of his property/territory. I usually laugh at him. Once in a while, I'll just stand up and dust his little short-legged self.

Another time, a LARGE, UGLY, beastly mutt was loose, normally secured; people were INSIDE their houses, staring out the front doors at him. I rode by him at about 40 feet separation; he circled behind me, and started to pursue, barking with a loud and aggressive, throaty bass. I stood, turned my head, and OUT-BARKED that mutha, to the point of hurting my throat. He immediately came to a halt, and I rode on.