One way to increase the potency of Bluetooth headsets as social poison is to wear them while affecting strange, inexplicable and constant head movement. With Plantronics’ new movement-charged headset design, that may become a necessity. The device relies on a small flywheel that, when rotated in a magnetic field, draws enough current to power the headset. Plantronics claims that the system would harvest enough energy to power the headset during constant use, which is actually pretty impressive.