One student taking a final examination in a large lecture class continues to write for about thirty seconds after the instuctor calls time and directs everyone to put down their pens.

When the student attempts to hand in his exam, the professor refuses to accept it because the student did not stop writing when ordered to do so.

Upon being informed he will receive a failing grade, the student imperiously asks the instructor "Do you know who I am?"

When the unimpressed professor admits that he does not, the student shoves his exam into the middle of the stack (of about 300 blue books) and walks out the door.