"Sometimes big things happen, and you have to respond to them. The Prime Minister is caught in bed with two hookers and a farmyard animal; you'd better have something to say about it when you're onstage that evening. Joke thieves are an occupational hazard to the comedian, but the truth is that if you make a habit of innovation, you will always be one step ahead of them. I'm writing this on a tablet computer. There are loads on the market now - but they are all playing catchup to the iPad."