I forgot quite how scary my old physics teacher is. But I also have figured out how to get him to believe whatever I say as long as he doesn't have direct evidence of whatever I was doing... Just look him in the eye with a straight face and call him "sir". Works every time, and works with just about everyone. The most useful lesson I have learned in high school would definitely be how to lie at someone's face with little to no tell. Now I just need to learn to play poker.