Special thanks to RazorD9 (aka a fellow Dan) for the question.
Daniel’s “brain song” in the second panel was sung to the tune of “Row, Row, Row Your Boat”, by the way. Or it was supposed to be…his lyrics didn’t work so well with it.
Also, we finally see Daniel without a hat here! And you’ll see more of him hatless soon! It’s like fanservice! O__O