One of my students threw her violin into the wall last night.
It was absolutely an accident; I was doing something to her bow and wasn't watching, and she was swinging the violin around, as children are wont to do, and it slipped out of her hand and crashed into the wall.
I think more damage was done to the wall than to the violin, but I used my "Quietly Scary Teacher Voice" to tell her that that's why we don't swing our violins. Big eyes, lots of nodding that she understood. I think the next couple of weeks are going to see a lot more diligence from me in terms of making sure my students are holding their instruments appropriately. And calmly.