While covering a high school track meet, my foot caught on the edge of a rubber mat and I went plummeting downward with my Canon 1Dm2 camera body attached to a 500mm f4.5, all mounted on a monopod. With my hand on the monopod shaft as I fell forward, the front of the titanium body was peeled outward by the force created by my body weight and the weight of the lens (around 8 lbs) leveraged against the camera mount. That truly sad part wasn't the fact that I totaled a $4,200 camera body and possibly damaged a $6,000 lens, but the fact that I went down, in front of the main bleachers at the meet with hundreds of people watching, camera first.
The lens actually survived and to this day works to spec. The camera body as you can see below wasn't quite so lucky.
The result of the fall is a front on view on the left and below, more pics which were first displayed on sportsshooter.com in my member profile in 2007 and seen by photographers both in awe and sickened at the sight of one of the world's best and Canon's flagship camera bodies in a state the kind of looks like the Terminator before he jumps in the vat of molten iron. Click the photos to see a larger view.
My favorite set of comments are on this site:
Here are just a few links to some of the sites that talk about the damage:
The lens was fine and in fact seemed to work better after the fall. The camera body was complete loss. I called Canon repair for the fun of it to see if they could repair it. That conversation is a funny story all its own which I might tell in the future.