This is an inside joke/throwback from a weird experience we had in Zirok, one of our cities on our old server. Our admin decided it would be cool to make regions only go down 50 blocks (without telling us mind you). To our delight we found a giant tunnel running under our city with an enormous region extending for miles. It was a lot of fun falling in there and walking 3k blocks to the nearest exit :D :D :D :D It was even more fun when Nuxas our favorite admin refused to make any compromise for us.