SpaceX Spacecraft

You sometimes get the impression that Tesla CEO Elon Musk says wild things just to gauge people's reactions. You have to be crazy to think that the Hyperloop is ever going to happen. Train travel is barely accepted in much of the country. Recently, he boasted in an interview with Britain's The Independent newspaper that he could build a flying car and a submersible one. If he's to be believed this time, one of them might actually happen.

"We could definitely make a flying car – but that's not the hard part. The hard part is, how do you make a flying car that's super safe and quiet? Because if it's a howler, you're going to make people very unhappy," said Musk to the newspaper. Obviously, the flying car has been an automotive dream for decades, but it has always been so disappointing. Even the long-delayed Terrafugia Transition needs a runway to takeoff and can't just pop in an out of traffic like we all want.

While the flying car likely remains a pipe dream, Musk seems much more serious about the prospects of a vehicle that can go underwater. He told The Independent: "We will be making a submarine car. It can transition from being a submarine to a car that drives up on the beach. Maybe we'll make two or three, but it wouldn't be more than that." The man does have some experience in this area. He bought the submersible Lotus Esprit last year from the James Bond film The Spy Who Loved Me, and planned to install a Tesla Model S powertrain in it. Now, let's see if either of these big ideas ever comes to fruition.