powerful and muscular dog

This dog mostly roamed around with his head down shaking a chewed coke bottle. There were many people standing around the courtyard and It would at times look up and approach the people with the chewed coke bottle in its mouth and a challengey look in it's eye.
I accepted the dog's challenge and on a few occasions defeated the dog. This video depicts the dog defeating me even though I could have easily defeated the dog again, my superior intellect and tactical prowess was bewildering to the largely instinctual creature.