Awkward Student

In college, a senior lecturer was scolding his students:
Lecturer: "answer is not good, uh even joking and chatting casually. Answering the question alone is also no one knows, so it's useless this lecture, Now that stupid STINK !!!! "the lecturer snap. A few minutes of silence. Suddenly from the backseat a student stood up. Lecturer: "So you're sure, you're the one that stupid ??? "" Not so sir, I just can not bear to see you
stand-alone...