— Patrick Walker (@PatrickWalker) May 11, 2016
That spray of sand you see at the end there is meant to help slow the vehicle down. The real Hyperloop won't be using sandbeds or rails, of course. The final product — a small version of which will be tested by year's end, according to Hyperloop One — will feature a levitating car inside a tunnel. Changes in air pressure inside the tunnel will help reduce drag, making it possible for the car to travel hundreds of miles per hour — covering the distance from Los Angeles to San Francisco, say, in roughly 30 minutes.