Eyes in the back of your head (and other places)
I was convinced that this [via BoingBoing] was a wind up. Can you see yourself wearing the Heartcam? Sure, it might prevent you being the victim of crime, but that would be because potential attackers are paralysed with laughter. Still, it might be amusing for those “Hello, I’m up here” moments (women - you know what I’m talking about).
