Android 4.2's "daydreams" are neat little screensaver-like apps that can run when your phone or tablet is docked or charging. Out of the box, there are five stock daydreams available, but there's a hidden fifth one that's unlockable if you access the Jelly Bean "Easter egg" animation.
As we first revealed back at Google I/O, tapping several times on the Android version number under Settings > About phone will bring up a large Jelly Bean smiley face. Hold down on that for a few seconds, and you'll be taken to a screen filled with even more happy beans.
Once that's done, the "BeanFlinger" daydream will be unlocked. Find it with the rest under Settings > Display > Daydreams. This process should work on any Android 4.2 device that supports daydreams.
Happy bean-flinging, folks. We've got video after the break.
Thanks for the tip, @bsrubio!