Pictured above is a Leica Tri-Elmar-M 28-35-50mm lens cut neatly in half. Call it death of a lens. I call it an interesting display on the intricate mechanical workings of a camera lens.
These were actually made by Leica students as a graduation project and boxed as a “cutaway model” of the lens.
This also gives you a good mental image of what you can potentially break if/when you drop your lens.
Thanks for the link, David!