Okay, we've gone back to crazy land. Imogen gives him a strained smile and a nod--yeah, sure, that's great. He really is a nutjob.

But music is a language Imogen does understand, and she finds herself humming along with the song, finding harmonics that really shouldn't work but somehow do. This has turned into a bit of a jam session.

Then the song ends and he goes back to talking about home. "I guess. My old school in Chelmsford used to be a palace."