Misride

A glance suffices to tell him if a horse has been "stiffened," and clever indeed must that jockey be who can pull or misride a horse without his eager eye detecting him.

It is as if a man came to me and said: "I present you with this horse, which is likely a Derby winner", and I, in possession of a racing stable, were to turn to my grooms and jockeys and say: “How can we lame it, break its wind or misride it so that one of my worn-out old cab horses will not be out-classed?"

At such a time, you couldn't spur him or misride him to the wrong spot with the strength of Superman.