Introduces the Solar System to students. Puts up picture of planets in order from the Sun. Only read the first three planets aloud to the students.
Student A: "Uranus!" Hoard of Students: *snickers* Uranus! *laughter* Uranus! Teacher: Could you explain why that is so funny? Students: *dead silence* Teacher: Okay, then we're done laughing at names of things.
Class heads into hallway and Teacher debates stopping students to have them explain why "Uranus" is funny to a coworker. Teacher can't keep a straight face just thinking about bringing it up to another adult. Lets moment pass.