I've posted this one ways back:

I was doing an assignment for Car and Driver on the German autobahn. The writer and I were at the scene of a rather spectacular accident that required the Jaws of Life to pry the victims from the car (who all were in rather good shape, all things considered). After taking all the photos I needed, we were going across the divider to the opposite side of the highway, where the squad cars were located.
Now, I had two camera bodies on me, one around my neck and one across my right shoulder. I step on the two-foot high steel divider, place the other foot on (so I'm now standing with both feet on the divider), and my momentum causes the camera with the 80-200 (a foot-long lens) to swing forward. The sudden shift of weight forward caused me to loose my balance, and I went crashing down. As I'm falling, the camera around my neck upturns itself, so it's pointing at me instead of away.
When I hit the ground, the metal lens hood drills itself into my eye brow and all I can see when I get up is blood squirting everywhere. Even minor head wounds look rather spectacular, I learned. Luckily, since we were at the scene of an accident, there were already paramedics on the scene. Got my head wrapped up, then later they put me in a neck brace, and took me to the hospital where I got my first and only stitches of my life. Bonus, I got up-to-date on my tetanus shots!
In the end, I made it into the story, and a bloody photo of me (I can't find it at the moment) appeared in Car and Driver.
(Here's the story if anyone wants to read it.)