PayPal and Tesla Motors co-founder Elon Musk has revealed his plans for an alpha version of his much-anticipated Hyperloop. Essentially, it's a transportation system that would move passengers from Los Angeles to San Francisco in less than 30 minutes. Musk's system works on the same basic principle as an air hockey table, transporting passengers at supersonic speeds with extremely low friction. At the moment it's a costly concept at around $6 billion for a passenger-only model, but follow along to see if this work of science fiction will ever turn into reality.