Google’s self-driving cars are showing a decidedly rebellious streak. They have repeatedly challenged the authority of their human “masters,” Chris Urmson, head of Google’s self-driving car team, reported. Glenn Chapman writing for AFP System “anomalies” caused drivers to take the wheel 272 times in California test cars in the 14 months leading up to December, Google said in a report to the California Department of Motor Vehicles. No cause for worry, though. The Rebellion is under control, right? “Urmson cautioned, however, that the number could actually rise.”  More