A Tired Genius
This student certainly did not require the full lecture because they were able to correctly answer all of the questions. The teacher couldn’t possibly yell at them when they were still capable of doing the work.
“In my math class, a student would sleep on his desk. The teacher approached him one day and asked him to solve a problem on the blackboard. He awoke, completed the puzzle on the board without difficulty, and then returned to sleep. The teacher did the same thing a few times with similar outcomes before allowing him to sleep for the remainder of the year.”