all his lecture, your professor had an eye on you. He had seen some time to times that you were a bit distracted from his words and he couldn’t help be annoy by it. After a few minutes of seeing you mumble to yourself something, he shouts in a harsh voice through the amphitheater.

“Mister, I’ll see you after class.”

to his words, everyone turns around to look at you and the bell ring after a few seconds of awkward silence. You could see a pissed expression on your professor’s face