Google has had its knuckled rapped this week by a traffic officer in California.
One of its driverless cars was pulled over in Mountain View, Silicon Valley for driving more than 10mph (16km/h) below the street's speed limit.
In a blog on Google+, the firm posted a photo of the motorcycle cop pulling the self-driving car over and giving the driver a caution.
The caption on the Google+ post said: 'Driving too slowly? Bet humans don't get pulled over for that too often.'
The police also issued a statement which said: 'As the officer approached the slow moving car he realised it was a Google Autonomous Vehicle.