I've trained a few dogs in my years...well, I've housebroken a few dogs, and even then, it took longer than it should have.  Basically, what I'm saying is that I'm not very good at training dogs, so to watch this video of a man doing nothing more than cracking a whip twice, and then to see what the horses do amazes me.  

I would try cracking a whip to try to train my dogs but I would probably hurt myself.