And I hope you grow shorter .

Publicly humiliate your students, does that make you look awesome? or taller?
Midget, you've learned and acquired so much and you know what, you missed out something which is way more important than what you've achieved all these years, RESPECT .
Imagine the one being humiliated is your son/daughter, what would you think and how would you feel?
Being accused on doing lazy job and not being professional enough to put up an informative presentation is not funny at all . So sir, yes, being polite and respectful calling you sir, you should learn how to respect each others irregardless on who they are and what they've done . It's a simple moral value I don't think you need a degree for that .