• Freud's theory was that when a joke opens a window and all those bats and bogeymen fly out, you get a marvellous feeling of relief and elation. The trouble with Freud is that he never had to play the old Glasgow Empire on a Saturday night after Rangers and Celtic had both lost.

    1965 Television interview, discussing Freud's theory of catharsis through laughter, whereby jokes produce a feeling of elation.