AB'ers of a certain age will recall his series 'The Worker' and his endless exhcanges with Messrs. Pugh and Whittaker, who grew increasingly appoplectic at the mispronunciations of their names.
I remember once on a 'live' TV show that one of his stunts went wrong, and he was actually inconcious for a few minutes - inconceivable in this slick digital times.
I'm sorry to hear of CD's passing - most people will be unaware of the debt modern comedy owes to him.