A form of technique of language that exhibits a natural flow of speech and grammatical structure
        
             
        
        
        
I don’t really think so, as an oxymoron is two contradictory words put together. Eg The living death, a small crowd or bittersweet. 
Plain and Surprise are not necessarily contradictory.
        
             
        
        
        
Mrs. Jones's behavior right after Roger tries to rob her in "Thank You, M'am" shows her to be the more superior and stronger of the two characters. In this case, <span>Mrs. Jones was outright disappointed by the crime and potrayed her defiance over the situation and the culprit</span>