Elon Musk is worried about flying cars - but it's too late!

Tesla CEO Elon Musk thinks we need to consider the pros and cons of flying cars. Last weekend, he told Neil deGrasse Tyson that "if there are flying cars, then wel l obviously you have added this additional dimension where a car could fall on your head and would be susceptible to weather."

Earlier this week, Musk took to Twitter to refine his point of view on f lying cars. "Flying car pros: Travel in 3D fast. Cons: Risk of car falling on head much greater, noisy, grounded in bad weather," he tweeted.

The age of the flying car is already here with companies, including an American one called Terrafugia, aiming to make "roadable airplanes" a reality.