If what you need today is a dog robot twerking to "Uptown Funk," well then you're in luck. Boston Dynamics' SpotMini robot is featured in a new video intended to show off its mobility, and it certainly does that as the robot dog steps, gyrates and dances in time with music. The SpotMini robot weighs about 30 kg (66 lbs) and is all electric. It can run for about 90 minutes on a single charge. It has 17 joints and an attached arm with five degrees of freedom.