You've made a commitment to yoga to improve your health.
So there you are in class, with a teacher you've never had before. And while you're flipping your down dog, you realize you're not exactly flipping over the teacher.
Maybe the teacher is a yoga bully: "Okay, everybody up for wheel! People in the back row, what's your problem?"
Maybe the teacher is making absurd claims about yoga ("Doing an inversion is like having a face lift!").
Or it's hot yoga and you're thirsty and the teacher says, "Don't drink!" But ...