I learned about Elon Musk when I heard about Tesla electric car, opposed to when he made his millions selling PayPal. This is just a short 15 minute summary. There is also a longer interview floating round YouTube which I have also watched and might post another day.
Elon Musk is a very inspirational person for me.
UPDATE (2014 09 16): I’m aware the video has been removed, I have been unable to find a good replacement at this stage.