Well, really, he wanted to talk about the constructed nature of the media interview, by way of a similarly awkward interview with Quentin Tarantino. Some things he didn't want to talk about (but did): his book, diversity in the media, and immigration from Norway.
Except this interview wasn't really awkward. It was an elaborate comment on the nature of the process.
It's unclear to what extent Channel 4's Krishnan Guru-Murthy was in on it. It seems likely he had plenty of insight into what was coming. Also if you didn't manage to laugh at the line "it's a hell of a medical form", congratulations.
This right here is the greatest end to an interview you'll see for some time.