Monkey Island 1 Easter Egg - The Stump

How about the stump in the forest....When examining the stump, Guybrush proclaims that a hole in it leads to a maze of caverns. If Guybrush tries to climb down into the stump, the game prompts the player to successively insert "disk #23," "disk #47" and "disk #98." (The game was actually distributed on 4 or 8 floppy disks.) The endgame credits also have an entry for "art and animation for disk #23."