There are several codes and conventions that film producers follow when making openings for crime films. For example, Martin Scorsese's films often feature voiceovers, freeze frames, and settings in New York City. Crime films generally take place in large cities with alleys, as that is where crime occurs. The characters typically originate from Italy but live in America and join the mafia. Their pride often leads to their downfall by the end of the film, with few happy endings. Iconic credit sequences open many crime films, and Saul Bass designed famous openings like Goodfellas. The editing in openings is usually slow at first and gets more exciting as an enticing incident occurs near the end.