Draw back from the dank, dirty room, and you will see a typical Ankh-Morpork mob; large, nervous, desperate to get their money back; even those who aren't owed any. A small, portable food stall weaves through the crowd, purveying its wares, and probably a lot of other things besides.
Let the eye of imagination draw back even further, till the whole of the Disc can be seen, with the great, glittering star turtle, Great A'Tuin below, old as time, patient as a brick(sorry for the stealing from TLF).
It hasn't noticed the brief flickering of the celestial beings, being far too slow-thinking to notice, and having seen much better special effects before-hand, as training.
Trying not to think too fast, the astrochelonian does what it does best; absolutely nothing.
Smilies are friends, not food.
..............Now You See It, Now You Don't..............
Proud Copper Widow