What's embarrassing at school?

There are many embarrassing things in school. The example I still remember is when I was studying in the library. Once I went to the toilet, all the books were on the original table. But when I came back, I found my book was gone. Then find this book in front of the library. The librarian thought I had left and put my things in front. Make room for those who want to study in the back. I am really speechless.