The Eclipse Fencing Box (used in the scoring of modern fencing bouts) contains a hidden song. If you hold down the "Weapon" button and then turn the box on (while still holding down the "weapon" button), the box will play the song "Daisy, Daisy". The box's creator is evidently paying homage to the fictional creator of the HAL computer from "2001: A Space Odyssey". As he "dies" HAL begins to sing "Daisy, Daisy"