@nullagent A few years ago, I saw Kurdish protesters at the White House stop horse cops almost instantly with nothing more than DRUMS. This was Washington DC's US Park Police on horseback, attempting to ensure an Erdogan supporter could harass pro-YPG/YPJ protesters without paying a price.
As soon as those drums started going, all I saw in front of my face was horse's ass and horses' tails as all but three of the horses defied their masters and took off running!
There was also an incident decades ago in Philly during a riot with horse cops. Ordered to enter a noisy crowd (which horses do NOT want to do), the horses bucked off the cops and charged down the street, for all practical purposes joining the riot themselves.