Otis used to kick out sideways with his back feet to try and get me while grooming. He isn't a particular fan of being groomed around his rear end, flank, or belly (possibly due to the abusive trainer he had. He's very shy/flighty of spurs, whips, and all that stuff. We've done lot's of touchy-feely work around those areas, but he has just never liked grooming so much.), and I am more than happy to deal with a horse that lays their ears back at me for my obbsessive cleaning. But the kicking? Not cool, just plain disrespectful.
But one day, while I was brushing the top of his tail, he kicked out sideways at me so suddenly with lightning speed, which I narrowly dodged. What did I do? Laid a sideways ninja kick to his marshmallow butt with a loud "H'yaa!".
He just stared at me with a shocked look on his face, "YOU ACTUALLY KICKED ME
I simply went back to grooming, forgetting that it ever happened. Otis has only kicked out a few times since, but only passing horses that he doesn't know. I'll probably invest in a red ribbon for shows.