Nothing beats combining your fears into one, absolutely terrifying object. This is a robotic snake that, when necessary, can blow itself up. Yes, a suicide-bombing robosnake.
Developed by the Israeli army, this robot is primarily intended to be used for surveillance, slithering around with a camera on its front. But if need be, it can be wired up with explosives just in case it finds itself somewhere that would be better suited as a pile of rubble.