Wei Xinlong, a senior at Northeast Normal University in Changchun, built this for his girlfriend Sun Shasha. Methinks that if this is real and works well, the world is soon to see a whole new wave of tablet PCs.
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.