What constitutes consciousness--not in the philosophical sense, but clinically speaking--has been a matter of great debate in scientific circles lately, particularly as new technological applications allow neuroscientists to peek deeper into the brains of those thought to be in vegetative states. Now, a cheap and portable EEG device has been developed that has detected signs of consciousness in three people previously thought to be in vegetative states.
A team in Germany have managed to modify a car so that it can be driven with Emotiv's electroencephalography tool, which allows a user to control something--be it a video game or a Volkswagen Passat--with only the power of the mind. Of particular note is the warning embedded in the video: Do not try this at home. Especially not in your regular, unmodified car.