"You made the decision to ride double, Lambert," Childermass shoots back in that typical bored-sounding way of his, as if this is clearly Lambert's fault. "You could have walked."

But no, apparently the horse doesn't go without Lambert on and so here they are. He will lean forward, though, giving Pig another squeeze to the sides to get her to pick up speed. He doesn't particularly want to cause any earthquakes, which seems to happen whenever the damn creature runs, but if that's what Lambert wants, well, he may as well take advantage of having a horse for the brief few moments he can.