Humanoid robot videos show machines lashing out

A humanoid robot starts swinging its arms inside an office. Another appears to surge toward a festival crowd. In the most upsetting clip, a performing robot kicks a child in the stomach. These videos spread quickly because they hit a nerve. Humanoid robots can move with startling speed. Once a machine loses balance or follows a faulty motion routine, nearby people have little time to react. So, what do these clips reveal about robot safety, and what needs to change before these machines move clo