I once vomited in school and all my clothes were in vomit, so I went somewhere and they gave me some ugly ass used clothes in which I walked in for the rest of the day.
Once during PE (we didn't change clothes) I ripped my shirt on a tree branch. I had to sit through the rest of the classes with a ripped shirt.

And last but not least, I once faked pooping in class to excuse myself out the PE class. No one believed me I actually didn't poop, the backlash was HARD.