A California design company called BRC Imagination Arts has proposed a rollercoaster that makes you weightless for 8 seconds.
The ride would be simple: Inside a fully enclosed Space Shuttle-looking vehicle, you’re dragged up a ginormous vertical track. Then the vehicle would drop at exactly the same speed as the falling passengers, creating the illusion of weightlessness.
This would require a precision, computer-controlled rate of descent. Although the coaster would cost $50 million to build, the designers point out that the theme park could rent it after hours to NASA to train astronauts for weightlessness.