I have not committed murder today.
Heading to an art fair and apparently the company the art gallery had transport the artwork, managed to break the glass on all frames.
It looks like a €450 damage. Obviously they hadn't insured it.
There is a slight chance the person who made the frame had left a slightly too large gap for the glass, allowing it to vibrate too much.
My experience with transport companies is though that if in doubt, it is they who messed up. After all, when I moved to the new apartment, the company my parents had hired then, snapped the legs of my desk in half, wrapped them together with tape, to better fit in the truck...