If you want the ultimate destruction then just push a button which is covered by a transparent box, marking its deadliness. Usb armageddon is projected to appease those who come very close to throwing their computer out of the window because of boring technology.
The keys are real keys, and you even have to flip the switches and turn the key in the correct order. If and when things start to go wrong, flippant open the apparent box, turn the key and press the button. It valor only make a sort of hooting noise, but you might get the feeling of authority and contentment. Cloaked as a martial ignition device it is equipped with a fully operational 4 port USB2.0 hub.