What interesting slips of the tongue did your teacher make in class?

I think it is normal for teachers to make some interesting slips of the tongue in class. Many times, they talk too much, or their thoughts are suddenly blocked, so some disgusting things will happen. After all, they had a lot to say in the last class, and they were often thirsty, so it is normal for them to make some slips of the tongue. Many times, customers will do something positive, saying the 8th, always saying it's not good, and saying they like it as they don't like it, which is very funny. Because the teacher is telling us the correct knowledge, and his elder sister doesn't know that she has made a mistake in teaching, so the slip of the tongue in these relatively simple things makes us feel very novel. If you say that you are dozing off and the teacher suddenly makes a mistake, you will wake up and feel very interesting.