As SpaceX's chief technology officer, Musk helped design the company's rockets. As Tesla's CEO and product architect, he stepped in to overhaul the car design..

As SpaceX's chief technology officer, Musk helped design the company's rockets. As Tesla's CEO and product architect, he stepped in to overhaul the car design... Holy poo! That is impressive by any measure. I can't tell you how many business types have approached me with ideas that "should be trivial" only to find out they have no cs or programming background. Wish there were more leaders with his willingness to get their hands dirty.