h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

The most amazing technological achievement of the PDA, from the Newton through the present smartphones, is the abiltiy of the device to convert stored energy into motion. They say "knowledge is power", this is proven by PDA's. Once there is enough "power" entered into the device it can teleport itself almost anywhere. Popular destinations include:
Seatback pockets of random airplanes or trains, the clothes washer (either wet or dry process), the bottom of the ocean, the toilet (especially true of smartphones on a belt clip), and of course into the hands of the last person on earth you would want to view it. Very rarely is there enough energy left for the unit to function after its return, in fact most of the time there is not enough left for the return trip at all.