Drawing Board My original plan was to use word balloons, with the characters saying
1: "Are you sure there are fireworks tonight?"
2: "Yes, Yes. Any minute now."
But then I decided that this looked a little like a typical New Yorker cartoon. And, since I intended this as a thank you card to Mark's parents for hosting me in the Hamptons over July 4th/birthday weekend, I figured they might appreciate the New York flavor. So word balloons become a caption (in Times New Roman italic, naturally).
I was a little concerned that the joke might be harder to understand without the extra exposition, but JoAnn got it immediately, so that helped confirm that it was a good choice.