Misuse usually involves the rider pulling the horse's head in to achieve a "headset" rather than getting the animal correctly on the bit. Like the equally controversial practice of rollkur, the horse does not flex properly at the poll, but rather flexes improperly at a lower neck vertebrae. This practice often results in a horse that is working in a "headset" or "outline" that, to the inexperienced observer appears acceptable, but the horse has no self-carriage or suppleness and does not properly engage its hindquarters.