Teacher's Day special: Funny quotes of Indian teachers

It's Teacher's Day today and while everyone is serious and reverent, some folks on social media are sharing funny things. Rishi Bagree quotes the three most famous quotes of Indian teachers.  "Is this a fish market?", "Please maintain pin-drop silence", "Finger on your lips".
A user mentions, "This is the worst batch I have ever seen" as yet another famous quote of the Indian teacher.  "Why are you wasting your parents' money?" is the fifth standard quote. 
Well, we know you all can relate to such stuff.  We have heard each of these from our teachers in school days.  Quite interesting that all of India has.