teacher was teaching calc to the class, and taught the wrong things, so a student was like... "yo miss.. thats not the right way of doing it"
she stared at him, got pissed off and yelled "if you think you can do better, come up here and teach instead." fully expecting him to shut up and let her continue to teach.
to her surprise, he stood up, and proceeded to walk to the front of the class, and taught what had to be taught.
i could have sworn the teacher shat the biggest shit bricks of her life.