Psy2k writes "Here are some type combinations that will drive your Mint 2 installation to do weird things: Appear the Mintman (someone like Superman...) and show a really strange "approved" stamp! Of course these are not bugs, they are Easter Eggs, that Shaun himself put into Mint for fun. Here is a quote from the original article:
# Easter Egg 1: After you log in, type b a and look on your bottom right corner in your mint page!
# Easter Egg 2: If you want to see the Mintman, log in and type R L Y B
Link to Original Source