I chose an episode from the Fresh Prince of Bel Air. It was the first episode aired, during this episode Will Smith moved in with his aunt. Originally he had lived in an urban city in Philadelphia, so it was a very different experience. He spoke very different from his family and often made fun of the way they spoke. Some of the words used during the episode were "Stupid" meaning "Good" and "Bad" meaning "Attractive". Will wasn't used to the way they spoke there and insulted them several times. Since Will didn't speak like them he thought it was weird, but to others they spoke proper English. Who has the right to say what proper English is? Doesn't speech vary within communities? The video is a little long, but the example I'm using will begin at 2 minutes and 30 seconds.
Throughout the video you can hear code-switching and the difference in dialects as they speak to each other. It's obvious that Will shared the same speech patterns with his friends back at home, but it wasn't so common in Bel Air.