Turtles!

The TMNT reference in Dalaran sewers = mint.

Nerd facts;
The guy who did the voice for Leonardo in the original TMNT cartoon also have done some voice acting for WoW.
For example Malygos, leader of the Blue dragonflight.
And as we all know Leonardo is the turtle with the blue bandana, and often seen as the TMNT leader.
I got all "OHHOHOHO" when I saw a comment pointing that out on wowhead.
WTB life.