Not really related, but you reminded me of something I saw happen at Faire, once. We were all pretty well accustomed to the idea that our horses generally don't like bagpipes. Interestingly enough, the ponies on site (not ours) didn't care much about them. But their little pony stud heard a drill one morning--and took it as a challenge. He kept trumpeting back at it, only... the drill didn't need to breathe. Poor little guy. (LOL)