Over an anarchic lunch, Mel Brooks wisecracks about everything from the new-found success of The Producers to his wartime high jinks. But the recent death of his wife, Anne Bancroft, has left him bereft. To slip briefly into luvvie parlance, Mel Brooks is what is known as a trouper. This means he always gets on with the job, come sleet or snow, a goonish smile slathered across his face (even if, in some lights, the smile does look more like a grimace). His old-fashioned trouper qualities manifest themselves in all sorts of ways. At one end of the scale, there...