The bike cops are not intimidating at all, just showing they knew they needed the exercise (there was no shortage of volunteers).
As for your dog’s reaction to the mounted cop, the Incas had the same reaction; in their initial encounters with the Spanish they supposedly didn’t understand the horse and conquistador were two separate things.
Lol. Sammy (the dog) compared to the Inca. Sammy was a STINCA, but NOT an Inca. :o)