Near the end of the game when you reach Lycentia's lair, using the Bagpipes on her instead of the Book of Magic will cause her to kill Torin and trigger a secret audio message from the game's creator Al Lowe instead of a regular death screen, with Lowe thanking you for playing the game and encouraging players not to tell others how they found the message and instead taunt them with "Why, I got a personal message from Al Lowe at the end. Didn't you?"
Contributed by MehDeletingLater