Ver Cuevana2. This Joint Is Jumpin' celebrates the life and work of the great Fats Waller. Fats started playing church organ at age 10 and his all-action musical career ended, full speed ahead, at the age of 39. This documentary features his son, Maurice, and Eddie Barefield and Marshal Royal, fellow musicians. Sammy Price and Paul Machlin talk about stride and Andy Razaf's widow, Jean Hutson, remembers him.