But often, when thy face [i.e., that of a horse] is turned from the stable, thou hast an unaccountable desire to place it in the position occupied by thy tail: thou stoppest, coughest, shyest, and erst, with swift detorsion, turnest round, then, with sidelong glance of my magic caduceus, ominously wagging between the horizon and thy ample sides, I incite thee on, but rarely does thy pace more than trot, from home.
Source: wiktionary