In 2007, Elon Musk did just that, debuting an early prototype10 of his Tesla electric roadster at the event. He also came up with the ideas11 for both his renewable energy company SolarCity and his superfast transit system Hyperloop while on the playa. And true to the Burning Man principle of gifting, he gave both away. SolarCity went to his cousins; Hyperloop, published online in a white paper, was an offering to the world at large (that has since inspired two different companies).