I am posting this in case Badspot would like to fix it or if people would like to mess around with it. It doesn't really break anything, it's just funny.
To do this you need a horse. Take the horse to the red Level 2 portal and park him next to it. Now, get off and run through the portal and try to get onto the horse at the same time. If it works right, you will be flung back out of the portal and off the horse, but you will still have control of the horse. You will not be able to move or look around (though you can turn the camera if you hold Z or whatever your free look is bound to). You now have a remote-control horse with nobody riding him!
However, you're pretty much stuck in the area around Level 2, which isn't very exciting, since if you go any further away you won't be able to see the horse to control him. I haven't tried the next part yet. Theoretically, you could have someone baton-hit you and carry you back to Port Town or somewhere more exciting than the side of a hill. It would be cool beans to have an empty horse riding around Port Town and the field in front of it. However, I don't know if getting clubbed would make you lose control of the horse or not.
Dying resets the trick and the horse stops moving. It's also reset if someone gets on the horse. Feel free to post any findings, or to call me a jerk if people already know about this.
