ARENA - Family Day [3] + Quiz (Patreon)

Gladiatrix Roman Arena Fight.
Gladiatrix Violanta Justitia fights against volunteers from the audience.

Comic PDF 

The QUIZ:

There is a hidden, very hidden funny allusion in one of the speech bubbles.

If you find it, send me a PM here, or a mail with the solution to info@entropia3d.com (from your email you gave to Patreon).

From time to time I will give hints in the comments here.

PLEASE DO NOT WRITE THE SOLUTION IN THE COMMENTS!

Nevertheless, you can ask questions in the comments, if I answer them? .. well ;-)

What you can win?
An early access to (currently) 12, usually non post-worked, surplus renderings. These are test renderings (but HiRes & Quality) or renderings I just didn't use for the comic. They can be NSFW or/and Pin-Up style and might have small flaws. These images will be maybe posted later somewhere (maybe weeks/ month' later in an Image Pack), or never.
You see 2 examples above.

Also, please comment if you like this kind of quiz, or your thoughts about it?