In 3rd grade, we explored planets and their year lengths. I wrongly flunked an assignment for designing a 200-year-old alien from Mercury, equaling 50 Earth years. The teacher dismissed my explanation.
"In 8th grade, I was thrilled to find a vending machine at my new school. Bought chips for lunch, just for a teacher to confiscate it, stating it's for teachers only, and ate them. 20 years later, still annoyed."