A newly hired teacher shows up to class to give his very first lecture

A newly hired teacher shows up to class to give his very first lecture. He stands up in front of the class and suddenly gets really nervous and can’t say a word. He stands like that for an entire hour without saying one word until the class period officially ends and the students get up to leave. Two of the students start talking where one says to the other “That was an interesting lecture.” The other replies with yeah “It really made you think.”