Ever fancied quietly frying someone's laptop or phone? 

Then the USB Killer is for you. 

When plugged into a USB port it steadily draws power and, when it has built up a large enough charge, it releases it all back into the USB port rapidly. This fries anything connected to the circuit. Ostensibly marketed as a testing device, it's easy to see the potential for malicious actions here.

What really interests me isn't the technology itself - though it is a neat application - but that this is a very clear example of the potential for cyber attacks expanding beyond digital. As enterprise and personal IT becomes increasingly complex - with more devices, networks and services - holes will inevitably open up in previously robust cyber defences. 

With so much innovation going on in attack vectors across all forms, it's a real challenge for cyber security professionals to keep ahead of the game, and not slip into being purely reactive.