You Must Be Joking! Too (1987)

This time, Leon Schuster plays a filmmaker who is making a candid camera movie, only to discover that another filmmaker has stolen his ideas and is making the identical picture. How so? It seems that the thieving rival is blackmailing Schuster´s girlfriend. With the help of his friends and an ingenious talking cap that he designed himself, the good director manages to outwit the baddie, get the girl and make the country laugh.