You, like your entire class, sat quietly in a computer science lesson and wrote a test that lasted the entire lesson. You noticed that Teacher Error was watching you, but you didn't give this special meaning. When it was over, you were going to leave the classroom after your classmates, but you were stopped

Ahem you Come here, please.

said a hoarse voice, looking at the paper you just handed in. What is it again? Did he suspect that you had copied the test or something worse?