You can enter special phrases to yield interesting results. Occasionally, you'll also have to indicate which version of an item you mean, if there is more than one definition. Some of the more interesting phrases are listed below, with any necessary disambiguation listed in parentheses.

Arcade (Game) - Your screen goes into 16-bit mode
Time Machine - Your screen will display old-fashioned effects
Night Vision Goggles - Your screen will take on a faint neon glow