"Now I know that you all only care about getting good grades. But school isn't ALL about GETTING good grades. It's about UNDERSTANDING the material. But you ONLY care about the GRADES! How are you SUPPOSED to LEARN if you don't UNDERSTAND the MATERIAL? Now I'm going to LECTURE you all for 45 MINUTES about stupid TOPICS and have my voice CRACK every FEW words, and more FREQUENTLY when I'M getting WORKED UP!" In summation: Physics can go die.