I'm watching the Tesla PowerWall keynote speech delivered by Elon Musk, so when he talked about the number of the PowerPacks that can change the energy usage in the world he made such gesture and said "(2 billion) may seem an insane number and I'm very tempted to do the billion thing".
So I'm wondering why the gesture means billion?
So I'm wondering why the gesture means billion?
Attachments
-
215.7 KB Views: 55
-
31 KB Views: 50