There’s many ways to write a joke. At the Hard Knock Knocks stand-up comedy school, we teach three. Our favourite joke structure is the Normal-Normal-Twist. The Normal-Normal-Twist takes the audience on a familiar journey and then suddenly zigs sideways, with a surprise. And no, we didn’t invent this. It’s been used by comedy greats for aeons, even Jerry Seinfeld. Seinfeld demonstrates …