VIZIER: Kowtow. Kneel upon the ground and touch your forehead upon the floor three times.

DOCTOR: (Outraged.) I shall do no such thing!

VIZIER: Kublai Khan is the mightiest man the world has ever seen. Not to pay him homage will cost you your head.

DOCTOR: Well, if it breaks my back, then he can take all of me! So why waste time on small items?