Watch Fly Rocket Fly for Free: How to Stream the Movie Online at 123Movies. . A long time ago, years before Elon Musk reached for the stars with his Space X project, a young man had his own childhood dream about a journey into space. This documentary tells the fantastic story of German astrophysicist Lutz Kayser who developed the world's first private space company. He did this under the curious and concerned eyes of secret services around the world.