Knightscope K5 security robot
The Knightscope K5 robot doesn’t cut the most imposing frame, looking more like a cross between an advanced portaloo and a fridge-freezer than Robocop, but it still serves as an effective security guard, streaming live 360 footage to a control point as it autonomously patrols its guard area. Unless it gets tipped over by a drunk, that is.

The five foot tall, 300lb robot was on duty in Mountain View, California (the heart of Silicon Valley) when a drunk man crossed the parking lot it was patrolling and apparently objected to the droid, knocking it over in what he later claimed was an attempt to test the security of the drone. Following the incident, the man was charged with prowling and public intoxication.

“The robot did exactly as it was suppose to do,” said Stacy Dean Stephens, vice president of marketing for Knightscope, in an interview with CNET after the event. “The ‘assault’ was detected and immediately reported. The alarms on the robot sounded, the suspected attempted to flee the scene and was detained by one of my colleagues and me until the Mountain View Police arrived.”