Crazy things you've seen your horse do?

My father was a race horse trainer so you can imagine that I had been in contact with lots of horses, the big horses called thoroughbred. We owned a horse with the name Who Knows and another with the name Knows How. The first horse, Who Knows, is a white horse that has won many races. His idiosyncrasy after a race is to pee right in the entrance of the stable. That horse wouldn't pee in the racetrack but only in that particular portion of the stable. My father would always warn us to clear the road when Who Knows is coming back after a race because for sure the "faucet will be running" was his term for that.