There are all sorts of ways to damage an instrument, and I’ve seen them all, I think.
No photo for this one–I’m just going to point you over to the first new article I’ve put up on my book site since 2012, an explanation of how I scan archings on violins with my carpenter’s laser.
Sometimes a violin’s arching is vulnerably flat, perhaps the wood is weak, or thin, or a combination of those, and the center under the bridge starts to collapse. Often this is accompanied by the top puffing up under the board and the tailpiece, towards the ends. In such a situation, the arching is first corrected back to the way it originally was made, and then