one of my favourite scenes would have been when he was with his son and he was teaching him how to win an argument and was using the chocolate vs vanilla ice cream debate as an example. the film basically manages to give the audience almost like a step by step guide on 'how to manipulate people well', thus in a sense it also openly uncovers exactly how we are all more or less being manipulated on a day to day bases, and in turn perhaps in doing so sets markers up for what people should be looking for so that they become better at spoting when they are being manipulated. and the fact that it manages to do all this in a humorous way just gives it even more quality, imho.