[he waits on the rooftop for someone to arrive. And what do you know, he hears Terezi's voice.

While that particular version of the rhyme is unknown to him, he wonders if Terezi would appreciate the human version]

Not by the hair of my chiny-chin chin~ [he calls out from over the edge of the roof]

But you can use the fire escape. [he is boss of pillow craft]