Has your horse ever seen his own reflection? What did he do?

My horse (being an only horse at the time) was rather lonely. One day he discovered a window in the garage the boarders his pasture. For the entire summer, he would stand by the window because he finally had a buddy, lol. He would munch some gr, then stop and look at his reflection for a little bit, then grab another mouthful of gr. He did that until we got another horse, and covered the window up =D