Elon Musk is nothing if not ambitious. Even though running SpaceX and Tesla takes up most of his time, he still has ideas for how he could revolutionize other industries, the most well-known of which is Hyperloop. When asked in an interview what he’d be doing if Tesla didn’t exist and he had all the time in the world, Musk stated that he’d probably be running a different version of Tesla that makes electric aircraft instead of cars. In fact, he’s already designed an all-electric just, he just hasn’t had the time to turn it into an actual product.