When we are dealing with lecturer, it can be a very interesting issue. Some lecturer is good and some lecturer is bad. Some is diabolical. Some can be childish. This is the tale of ZD (pronoun zee-dee). Oh man, this lecturer is the best lecturer in the whole universe. He teach very well and everyone in the lecture room will understand what he taught. And when the whole class is noisy, he will stay calm and will not cancel the class due to some anger. He actly maturely to deal with the class and ending up all the student liking him. When he make joke, everyone in the class will laugh.
If you get what this message is about.