We've all had a teacher like this. I had forgotten a lot of this math. Hey, it's the quadratic formula! I can at least recognize that! I had a sadist teacher known as Coach Biggs. He showed us what he claimed was a bottle of severed tongues.
He was our driving instructor. Obviously, that wasn't until later in my life. It was still pretty sadistic though. Should I even be telling you this stuff? Well, you told me your story.