Fredda did this popular comedy (called chanchada in Brazil) while waiting to return to Italy after complete "Il Guarany", also made in Rio de Janeiro. It is a very rare film, made almost without money, but possess many traces of Fredda's style. The cast includes Gianna Maria Canale, of course, but also Anselmo Duarte (latter a famous director who wins in 1962 the Golden Palm in Cannes with "O pagador de promessas"), Oscarito (the most popular comedian of Brazilian movies) and Grande Otelo, the charismatic afro-Brazilian actor. Says the legend that "O caçula do barulho" is the first Brazilian film to presents a good scene of fist fighting, and also to introduce the mixture of comedy and thriller who became a model for decades to came.