Another thing this video has made me aware of and that is; in real life we seldom say what we really want or mean to say, we often shy away from face to face, up-front conflict, whereas in fictional dialogue, everyone comes out point blank with what they mean? Perhaps it's wishful thinking, and wish we could do that in real life. Also in real life, we hardly ever have the punch line ready, whereas in fiction, as the guy said, we can go away, think about it and come back with the punch line ready! In fiction we have to make dialogue look genuine, but if we write the dialogue we use in real life, that would never seem real at all.