For the launch of the new Vauxhall Astra, Crispin Jones designed special keycases: they only allow people who are excited about driving the car to do so.

A galvanic skin response sensor on the front of the keycase measures the driver’s excitement level (used in lie detector for example, GSR measures minute changes in sweat levels on the surface of the skin). If the reading is sufficiently high then the case will unlock. If not then it remains shut.