No, I'm not headbanging. It's just the 'shake-to-shuffle' feature.
Instructables user hanlin_y did the math and realized that alkaline batteries are one of the most expensive forms of power that consumers can use. So he/she/it came up with a solution to power your parts even if they don't come with an AC adapter. With a wall plug, wires, and bamboo strips you can run your electronics off the grid; saving money and the environment at the same time.
From the submitter:
So you have a ceiling fan in a room with a cathedral ceiling that needs a light bulb and no ladder available. Using a broom stick, an empty pill bottle, a hair scrunchy, a large chef's knife, and some duct tape you can build Bulb Changing Tool 5000. Simply cut a series 1-1/2" long slits lengthwise starting at the open end of the pill bottle to make a collapseable bulb holder. Wrap the hair scrunchy around the pill bottle to enable a nice grippy action. Punch a hole in the bottom of the pill bottle.
Deviant Artist Midnight Angel put together an arm blade stylized after the ones used in the Assassin's Creed video game series. Using a drawer opening mechanism, a spring for a screen door, and a throwing knife, the weapon works surprisingly smoothly. The full instructions are on Angel's page, and you can see it in action below.