King's Quest VII- Mask of Eternity Easter Egg - Apple of Nakedness

You can find a potion that allows you to see invisible things at the house on top of the cliff.
Instead of taking the potion right there like you're supposed to, carry it to the house of the girl the Hero was talking to at the very beginning of the game.

Take the potion, and look at the trees to the left of the house. There should be an apple growing on one of the trees. Click on the apple, and the Hero's clothes disappear (although he has a little mask icon covering his privates *sigh*).

This is DEFINITELY worth seeing. While he's naked, have him use the grappling hook and move up and down.