Here's another one. I must have used up at least three of my nine lives. meow.
Working on a fish tender in alaska that had a huge fish hold (about 130 tons as I recall when we plugged it).
The boat was a circulation-tank style, which pumped refrigerated saltwater to keep the fish cold. The pipes were 8" and held down by massive clamp/bolt systems due to the abuse they took at sea.
We had just unloaded the last bucket of fish on a delivery and was climbing out of the hold with slimy gloves on. As I grasped the lip of the fish hold, my gloves slipped and I plummeted downward.
I remember glancing over my shoulder as I slipped, and realized my point of impact was one of the circulation clamps, directly on my lower back. With every ounce of energy I had I twisted to my side, and somehow understood that if I was to survive without major injury I had to relax on impact. Which I did, and it knocked me out for a moment when my head hit the floor of the hold.
When I came to, I was slumped sideways over the tie-down, and it had hit me just above my hip and just below my ribs.
I sustained bruising to the area that lasted for weeks, but other than that was fine.