I got a detention for using my backpack full of books as a lethal weapon. I have the English anthology in there and that's a big book, it does some serious blood force trauma damage. It's an awful book though.

Apparently that started a trend so the school introduced a rule that said that all backpacks must be put in lockers at the start of each day. Which was stupid because the lockers weren't big enough for that. So everyone was forced to carry their books to and from school by hand.