In the movie Trading Places there is a scene where someone is asking Billy Ray Valentine his opinion on finances in a restaurant. When he is about to answer, the whole places freezes as everyone prepares to hear his sage advice. It is a scene that demonstrates just how traded the places have become, it is also a not so subtle references to an ad campaign for the company EF Hutton.
In a classic string of commercials for the company, when someone is about to talk about what EF Hutton has to say, everyone tries to listen and it grinds life to a stand still. It was a very effective advert and one I still reference from time to time in my life (although fewer people seem to get the reference).