Jules was terrified of heights. While performing on the tiny rooftop during the song "New York, New York" in the film On the Town the only way he could perform the number was while one end of a rope was secured around his waist under his sailor suit. The other end of the rope was secured, off camera, to Stanley Donen. And even so, alert viewers of the scene will notice that during the scene Munshin is almost always touching a wall or a prop or another actor.