Video: The Kitty Hawk flying car gave a jaw dropping demo in San Francisco

Kitty Hawk, the Silicon Valley startup building personal flying vehicles, is back in action. The company took its machines to the San Francisco Bay a few weeks ago, wowing onlookers as pilots swooped through the air, gliding past the city's scenic landmarks. 

The demonstration, which you can watch in the video below, was the first appearance of the Flyer machine in a high profile setting. The previous videos of the Flyer were filmed at a remote lake in California. 

Kitty Hawk CEO Sebastian Thrun told the crowd of onlookers in San Francisco that the final version of the vehicle, expected to go on sale by the end of the year, will be able to fly for at least 20 minutes and have a range of 50 miles and operate very quietly. 

Check it out: