That kōan has an obscure codicil. Not many know it, but if this response is given, the student is known to be enlightened, and can skip all further training:

Huongbo looks dazedly up from the smoking ash pile of the former fox spirit and into the eyes of the grinning Baizhang. Speechless at first, he finally stammers "Baizhang. That's quite an act. What do you call it?" Baizhang wraps both fists in Huongbo's beard, pulls him close and screams "The Aristocrats!!"