So reading at the back end where she thinks about the dragon being all black in color I started thinking "I wonder how these people would react to seeing and actual -". That's when I hit the joke page and laughed, partly because of the coincidental snowflake trigger, but mostly because I'm reading on my phone in landscape and the reader has a tendency to cut off the bottom portion of the page much like how the bottom of the image is snipped.
As for what my thought process got cut off with I'll leave that to others who have no legitimate reason to give a shit about it to speculate.