Jack Nicholson's a good Joker-by significantly the ideal point about this movie-but/and his Joker chortle is this Jack Lemmon-esque bark which distracted me with a million-greenback realization: Jack Lemmon would have been outstanding as an interim Joker in the 1970s. Throw in Walter Matthau as a father-joke Riddler and you have received very good stuff, hypothetically talking.