I’ll go first:
First day of highschool, slipped and fell in a puddle of vomit, and some kids laughed. Sheepishly went to the bathroom and rinsed my uniform, and put it in my bag. Spent the rest of the day in gym clothes which I luckily had that day, still smelling like vomit though.
Good thing when you don’t know anyone yet is nobody remembers.
I wrote a poem for a girl once, back in high school. It was an angsty, acrostic rant about love and relationships and shit, where the first letter of every sentence spelled out “do you want to go to prom anyway”.
I walked away while she read it, trying and failing to stay cool, but I was still within her eyesight when she finished and said no.