Here are some of the most-upvoted replies:

1.

Instant fear as line moves."

u/AEONmeteorite

2.

Two actresses in a vintage grocery store scene, dressed in period costumes with a shopping cart

“That final week of a long school break.”

u/Honest_Math_7760

3.

“The first death of a pet.”

Arthur character D.W. stands by a fence with one arm raised, wearing glasses and a pink dress

u/PermaBanTogether

4.

“Calling your teacher mum.”

u/Pinotnoirmidsizedcar

5.

Woman with short hair looking surprised or apprehensive

“Getting karate chopped in the leg by a scooter.”

u/ToppHatt_8000

6.

“Having to ask permission to go to the bathroom in class.”

Students in a classroom with one raising her hand, and a teacher in front instructing

u/manykeets

7.

“Your dad screaming about how math has changed while trying to help you do your math homework.”

u/starloser88

8.

Child engaging with a vision-testing machine under an optometrist's guidance

“Getting your eyes checked and having them shoot air in your eye.”

u/cosmic-erruption

9.

“Getting lost in a store or crowded place.

Close-up of a person's skin showing a rash with multiple raised bumps

“Getting chicken pox.”

u/kkakeNation

11.

“Getting braces.”

Overgrown nettles surrounding a weathered wooden fence in a natural setting

u/Redditfront2back

“Genuinely some of the worst pain I have ever experienced.”

u/Sandcat9000

12.

“Stinging nettles.”

Hands assembling clear and blue blocks on a LEGO baseplate

u/Dizzy_Dress7397

13.

“Waking up at 6 am-7 am to get ready for school.”

u/Carbon-Base

14.

Child swinging on a playground swing set with clear skies in the background

“Stepping on a LEGO brick barefoot.”

u/WoodenContact6798

15. u/AdInfamous1303

16. u/Fuzzy_Studio_4543

17. u/Difficult_Room8110

18.

“The lice checks.”

Person braiding another's hair in a home setting. Hairbrush and clip on floor

u/GenXer76

19.

“Having to finish your plate at dinner, even when you’re full or dislike the food.”

u/Forsaken-Owl-6207

20.

Teacher standing in classroom with hands on hips, interactive whiteboard behind, students at desks

“Group punishment at school.

u/CunningRunt

21. u/GathersRock

22.

“Going to another class and interrupting to ask for something while the entire class stares at you.”

Ms. Krabappel teaches as Bart and other students listen in a classroom from "The Simpsons."

u/ExcitedEntrepreneur

23.

“Falling over outside and scraping your knee.

I swear that sh*t was the most painful thing ever as a kid.”

Playground with a slide, swing set, and climbing ladder amidst trees and fallen leaves

u/wellyboot97

24.

“Metal slides.”

u/angelofjag

“And those slides reflect the sunlight, grilling you alive.”

Child pointing to a lost tooth in their smile

u/AlbiTuri05

25.

“Track and field day, or sports day, or whatever you called it.

Three kids who somehow are great at all of it win everything.

Everyone else feels sh*tty.

u/TodayIAmMostlyEating

26.

“Having to pull a wobbly tooth.”

u/Desperate-Mango-7464

27.

“Getting chased by an animal which, at the time, was as tall as you are.”

u/MagicSPA

My note: where I was from, this was ALWAYS a rooster.

Shout out tou/Blueguyy_redditandr/AskRedditfor having this discussion.

Note: Submissions have been edited for length and/or clarity.