Elon Musk has issued a new warning about advanced machines. The Tesla founder, who has been highly critical of artificial intelligence developers over recent months, has revealed his thoughts on Atlas, the backflipping humanoid robot. A video released by Boston Dynamics earlier this month shows the machine backflip off a raised platform, land perfectly on its feet and raise its arms in the air as if to celebrate. "This is nothing," Mr Musk tweeted in response to the footage. "In a few years, that bot will move so fast you'll need a strobe light to see it. After being asked to clarify exactly what he meant by the strobe light comment, he added, "Otherwise you'd only see a blur." He then followed this up with an update calling for the regulation of AI and robotics, something he believes to be not only necessary but urgent. "Got to regulate AI/robotics like we do food, drugs, aircraft & cars.