They’re singing a hymn in the first panel. (It’s Sunday, after all; in Catholicon, all activities pause for Mass.)
Narration: The last day of the con — Sunday — passed in a blur.
Heinkel: The parody contest looks like fun…
I got the Narnia box set for five bucks!
Yumie: Don’t you have two of those?
Heinkel: Yeah, but five bucks!
Narration: After all, we won. Anything after that was just anticlimax.
Heinkel (present): Also, he was falling asleep standing up.