//In precalc. Giles draws a horizontal zigzag line on the board. Giles: "Do not EVER draw your sine graph like how a first-grader draws mountains. I don't want to poke my eyes out with your sine graph."
Rose: What's the arc sine of negative one half? Student: Eleven pi over six. Rose: Oooo... who said that? What's the correct answer to the arc sine of negative one half? More Students: Eleven pi over six. Rose: Ugh! If you say eleven pi over six, I want to, like, kill myself. So wrong, unbelievable, it's totally unacceptable, and really really really really really bad, and wrong, totally wrong!!!