Unexplained riff: Susan Rothstein?

This is the first time in doing this project that I’ve come across a riff I don’t understand and can’t really find a decent explanation for.

It comes from “The Chicken of Tomorrow,” a short in front of “The Brute Man,” ep. 702. It appears to be a reference to an artist named Susan Rothstein. Check it out over at the “Unexplained riffs” page and offer thoughts on it here or there, if you so choose.