Google has introduced prototypes for a self-driving car. The company released a photo and a video, “A First Drive,” featuring a variety of people taking a test ride/drive/spin in the cars. “It was cool,” said a woman named Thida, in the video. “It was kind of a space age experience.” This is really a second debut for the cars. Google showed off non-functional versions in May, but the project team has been busy since then.