Paragon Chat has a number of easter eggs in it. All but one have been discovered, and it's one that has been there for over a year, but was never discovered. I dropped a few hints about it when it was first added, and figured that somebody would eventually run across it by accident. Apparently no one did, and I didn't think about it much after that.
On November 10, 2015, Paragon Chat 0.99b was released, which among other things (like the monorail dialog), included a new easter egg. For the completionists out there, here's how to find it. Triggering it on purpose requires a little planning, as it was designed to be a very rare random occurrence.
1. Find a TUNNEL portal that is relatively close to another door. Make sure the other door is one that gives you a cannot enter message.
2. Click repeatedly on the portal. You'll get a series of random messages.
3a. If you get a message that includes "Whoa", "lunch", or "sign", STOP. These are one-shot messages, and once you get one of these, you can't get another one-shot message (or the easter egg), no matter how many times you click. If you get one of these, go click on the other door to reset the flag and start the cycle over.
3b. On the 10th click and after, if you haven't gotten one of the other one-shot messages, you have a small chance of getting the easter egg. You'll know it when you see it.
Due to the one-shot mechanic, the minimum number of failed attempts, and the fairly low weight in the pool, it's something that would only happen to people spam-clicking on doors to try to see all the messages, and even then be quite rare. The conditions are also set that way to make sure it's not something that a roleplayer could accidentally stumble into, as it's quite immersion-breaking (be warned before you try this!).
So, uh, good luck! If somebody bothers to try this, I'll figure out something special to do for the first person who posts a screenshot of it.
For bonus points, 3 of the other messages are pop culture references. One is super easy, one is fairly easy, and one is a bit obscure.
