"I've never stopped thinking about the. string theory, I don't know the half of it," he says. "There are a bunch of attempts to sort of make a grand unified theory that incorporates the quantum stuff and the relativity stuff." A lot of the proposals involve hidden dimensions - these are additional dimensions wrapped up in ways you can't perceive them. But there's also this fun thing about the hotel infinity: Could you talk about hotel infinity for a minute? Yeah.