My horrid former Chinese lecturer, Mr. Yau Kin Yan at Caritas Francis Hsu College, has a horrible teaching style. 

He just likes a monster. In his lecture, no notes or hints of examination are sent and all students need to prepare a pen and notebook to drop down something he wrote and said. Furthermore, he always asks the questions which we never know the answer and ridicule our answer. 

Ironically, nobody has complained him although nobody likes him because all of them understand they can get the new knowledge from his lecture.