I didn't really want to do another sequel. I go to those movies, and I just sort of enjoy them like a viewer.
Celebrities say they date other celebrities because they have the same job. But I think they just like dating famous people. Celebrities attract each other, like cattle.
For example, a breakthrough in better batteries could supplant hydrogen. Better solar cells could replace or win out in this race to the fuel of the future. Those, I see, as the three big competitors: hydrogen, solar cells and then better batteries.

