Oh, I can't sleep, whatever - it's a huge problem. The comedian's thing is you self-medicate with alcohol and knock yourself out - but obviously, that's not a long-term strategy.

I think what I do is borderline art. Most people who do borderline art have to have other jobs, so I'm very grateful.

I'd quite like to write a book about comics, actually. But trying to write about comics as literature, which I don't think anyone's really done before. Sometimes they're more like fan books, and I'd quite like to write one about the Marvel universe over the last 50 years. It's an unprecedented achievement to create that length of continuity.

If a gig goes badly, my main worry is, 'Will these people come back?' Because that will affect my ability to pay the mortgage - but nowadays, I don't really mind what happens, as I think if it all goes wrong for real, you still have to go with it.