Two horsemen, standing on low rocks, try to restrain a horse that has evidently bolted and turned around against the course of the procession. Despite the many breaks and damage, the rendering of tension is clearly extraordinary, with the chiasmos of movement and suspense between the bodies of the horsemen and the horse itself rearing on its hind legs. Blocks XIV and XV are precisely above the last intercolumniation of the opisthonaos, where the viewer sees together scenes of quiet and of action.