Keen 4 Easter eggs
From KeenWiki
Mooning Keen
Keen mooning at the player in Pyramid of the Moons.
By entering the Pyramid of the Moons and locating a picture of a crescent moon drawn onto the floor, you can make Keen moon. Simply stand on the picture of the crescent moon and wait. Keen normally looks impatient and after a while sits down to read a book, however if you are standing on the moon picture then instead of reading a book Keen will moon the player.
This can only be done once per game, you will need to exit and reload the game to do it again.
