Thangka often overflow with symbolism and allusion. Any kind of literary allusion is ordinarily celebrated. Both allusion and pastiche are mechanisms of intertextuality. Much of the play is steeped in scriptural allusion. They were thought to imitate reed mats, as an allusion to the mythological underworld waters. The very title of the documentary is implied to be an allusion to the poem. This poem could be considered as a work of societal allusion. Art historian John Sheeran suggests this is a classical allusion that signifies opportunity. An elaboration of this allusion is found only in a late Parsi commentary. Lula boards the train eating an apple, an allusion to the Biblical Eve. Intertextuality is the relation between texts that are inflicted by means of quotations and allusion. Another showed Wells and Squires held aloft by a broomstick, an obvious allusion to witchcraft. Its name suggests an allusion to Choronzon. Payne concluded the piece with a brief allusion to the first Pomp and Circumstance March. The title is an allusion to lunacy rather than astronomy.