when I was about 9 I started hearing other kids say "My bad..." for the first time. But I heard it for the first time at the end of recess, when some kid had left his lunchbag and a teacher was going around asking who forgot theirs. So the kid went up and seeing him taking his lunchbag, I thought he said "My bag...." and the next day at shop class I pushed someone's eraser off the table by mistake and said "My bag..." One of my classmates said that it's supposed to be "My bad..." They all laughed.
A childhood belief about speaking

others believed things like this
- I used to believe that when your pencil ran out of eraser that if you sharpened it it would grow a new eraser— Nikkie
- As a kid every time I heard a person say "it's about time" I always replied "so what about it?"— Eli the Kid
- when i was little i thought every time i left the room my parents turned into aliensAnon
- I used to think the word "european" had something to do with pee, and that kids weren't supposed to say it.Anon
- The first time I hear about a serial killer, I laughed. You can't kill cereal. It's not alive.Anon
- I used to think my elementary school gym teacher's name was "Jim Class".— Brandon Campbell