When he's not trying to get us to Mars, making solar actually work, or producing electric cars that ...

When he's not trying to get us to Mars, making solar actually work, or producing electric cars that make people like me salivate uncontrollably, +Elon Musk works on Hyperloop.

https://twitter.com/elonmusk/status/366964441159438337

Pretty sure my productivity for the afternoon just went out the window.