It is wrong to humiliate someone.
Stan was watching a man do a speech, and the man started stuttering.
Stan wanted to make the situation less awkward.
Stan asks the man a question about the content of their speech.
Stan made fun of the man's stuttering as he gave the speech.
The man doesn't have to think about his stuttering and is able to finish his speech.
The man giving the speech becomes insecure about his stuttering while giving his speech.