If ever Pepper gains sentience and starts looking for a boyfriend, Bob sounds like the perfect candidate. Just like Pepper, Bob takes on a legless, rather funny appearance (as opposed to South Korea's intimidating robotic prison guards) and serves a specific purpose: to assist human security personnel and alert them when there's trouble. In fact, he just joined security company G4S for a three-week trial, where his current duties include scanning and filming every room in its Gloucestershire headquarters in 3D. He can also notify his operators not just of any suspicious activity, but also of things that changed since his last round, like if an emergency exit is closed when it shouldn't be. Obviously, the University of Birmingham researchers who created Bob didn't design to replace human guards, so you can breathe easy -- for now, anyway.