When I was in 6th grade, I was in study hall and asked to use the restroom. The teacher told me no. So, I walked up to his desk and told him that I really had to go. He again said no, because he had my sister for math class the previous year, and she used to roam the halls. I responded, "I'm not my sister," and walked out. When I came out of the restroom, I saw him down the hall standing outside the classroom with his arms crossed glaring at me. But, he never bothered with me again, and thankfully I didn't get him for any math classes.