 Goffman explains that the way a conversation is keyed is critical to understanding the intent behind many utterances in everyday speech . Key is probably best understood as the tone of the dialogue which can change numerous times during an interaction . <unk> a change in key is one way that framing often takes place , “ special brackets will have to be introduced should he want to say something in a relatively serious way : " <unk> aside , " " Now , I 'm really serious about this , " and other such <unk> become necessary as a means of momentarily down <unk> the flow of words . ” 
