I have two stories which are both kind of sad, but I was disgusted. During high school obviously a lot of "changes" happen to us and all that junk, but I remember a girl getting off her stool and seeing her menstrual blood smeared all over it. I felt so bad for her, but also incredibly ill. The second story was this guy who wasn't allowed to use the bathroom during maths (I'm English, so we say "maths" instead of "math), so he ended up releasing himself in his seat. A girl in the class commented that "it smelt like chicken" (never want to eat chicken at her house). He ran out of the classroom and I almost vomited in my mouth.