This didn't happen in school, but I was still trick-or-treating as a teenager (which honestly I felt super awkward doing by that point, but it was easier just to do it than explain to my parents that I felt weird trick-or-treating, just not my thing) and one year (6th grade) I was dressed as a grim reaper, with like a full mask/hood and everything. And when leaving one house after saying "thanks" for the candy I tripped over my costume and fell off their porch and oh man was I embarrassed under that mask. Everyone was nice about it - even other kids who were there trick-or-treating - and asked if I was okay, but I wanted the ground to swallow me whole then and there. So basically I would've stopped trick-or-treating earlier I guess. I'm sure there are other things that happened in school itself that I'd like to change, but I can't think of any off the top of my head so maybe I repressed them or something lol. I know I've called classmates the wrong name before - I am... so BAD with names, even people I'd had in classes for years - so I'd change that if I could I guess.