We all have some awesome class memories, but some are better than others.
I had a chemistry professor who would walk into the lecture hall every class and place a tennis ball on the podium. No one really thought about it that much and it was dismissed as a professorial quirk. One day a kid fell asleep in class. When the professor noticed it, he didn’t skip a beat in his lecture. Without pausing, he calmly walked to the podium, grabbed the tennis ball and hurled it at the kids head. It hit him almost square in the face. He was shocked, we laughed, fun times. The next class period the professor walked into the class like usual but this time he placed a baseball on the podium. Not one person fell asleep in that class for the rest of the semester.