This text is a rewritten classic joke, put the first time in the Gnome-related thread, hence that little faction inconsistence.
Let's assume that being a part of Gadgetzan gives you a lot of unexpected knowledge!
A tauren, an orc and a gnome who had met in Gadgetzan were wandering through sands of Tanaris. Close to Zul'Farrak's site they found an old olive lamp with mysterious ornaments.
The orc's leg started being itchy, so he took the lamp and used it as a tool to scratch the leg…
After that, there appeared a genie who said to the walkers:
-- You have released me, so I shall fulfill your three wishes, one per person.
-- I so like the Mulgore… -- said the tauren. -- Let its meadows be always green and lush with fresh dew every morning.
-- It seems to be boring, but you will get it. Next one.
-- Encircle the Orgrimmar with great, strong wall to separate the city from undisciplined bushwhackers and annoying troll chickens! -- said the orc.
-- Done. And you, my little friend?
-- This isn't my exact wish, but please tell me something more about those Orgri's fortifications.
-- They are around the whole city, reach higher that the zeppelin towers and are so durable and consistent that even a worm would not pass through them.
-- So pour the Undercity goo inside them until it reaches their full height!