To gain control of the car he has to do one of three things: hit a red button near his right hand, touch the brake or turn the steering wheel.

But fall out of touch, and hunger becomes diet enemy number one: you may eat more than you need or get too hungry and stoke out-of-control cravings.

Users can control one of the sensors to manipulate its camera and laser rangefinder with a touch screen and stylus while an automated control flies the UAV, writes Richard Whittle of Aviation Week.