Many years ago, I had a very calm mare that I loved to ride and was a pleasure to be around. In a hunt along the western mt- Idaho border, I encountered an ugly situation. In a lot of that country it is common for the yellow jackets to build underground nests. It keeps you on your toes early in the season.
I encountered one of the nests on the trail and I swear that mare stood on one leg and swatted at the yellow jacket swarm with the other three and then took off down the trail. Kind of gets your heart pumping.