I have many that I could consider my worst, and I suspect I’ll return to this topic many times as they come back to me, but the ones that come to mind?..
We were playing Gaga Ball (basically floor dodgeball) in phys ed when I was younger, and when I tried to scoop up a ball, my fingernail slammed into the floor. The nail cracked down the middle and started bleeding. Luckily, class was over, but I was too antisocial to ask for a bandaid, so I had to spend the rest of my day with a painful, bloody, and quite frankly, disgusting fingertip that got caught on everything and anything. My parents never noticed (come to think of it, I don’t think I ever told them) and I was able to clip off a chunk of my nail that afternoon. Everything was well and good, but the skin where the nail should be was exposed for a week or two, and it hurt like you wouldn’t believe.
It was all a learning experience. I cut my nails more often now. 
One Monday morning in seventh grade, my English teacher gave us a research assignment due for that Friday. I could’ve finished it in an hour or two that afternoon, but I decided I’d do it Tuesday or Wednesday. Welp, I completely forgot until Friday morning when a friend reminded me that it was due that afternoon. I tried to do it during math class, which led to me falling behind on my math. My math teacher got mad at me and a few others for not doing enough work, and she gave us some extra work that she wanted in during lunch. Now, I already knew it wasn’t getting done, but sacrifices had to be made, so I proceeded with my English work. I managed to finish it during lunch. It was really rushed, and probably terrible, but it would have to do. We turned up to English class and, surprise, we had a substitute teacher who wasn’t collecting the work, and now the due date had been pushed to Monday. Not only that, but my math teacher called me down to her class because I didn’t give her the work she wanted. As it turns out, most of the other people she assigned the same thing to didn’t do it at lunch either, and the teacher was asking us, one by one, for our excuses. Most of them were bad liars, but when she got to me, I told her about the entire assignment I had to do. She didn’t believe me, but the other kids, who were mostly strangers, backed me up, and reassured her I was telling the truth. The teacher ended up giving me an extension.
I had to do all of that work over the weekend…
