I have been (knock on wood) fortunate to avoid for the most part broken rods, eyelets, etc. I did forget to tighten the drag on a pole that was in a rod holder on my friend's boat with a weight on the line that got picked up in the wind . . . and 200 yds. of almost new 20 lb. mono ended up strewn up and down the street on the way to the ramp.
My friend also almost lost his sinking gaff in the ocean. He went to gaff a fish, realized he hadn't removed the tip cover, and as he went to remove the cover the fish (fortunately not a very big one but big enough) got off. He was so upset he threw the gaff down and it bounced off the deck and into the water. He had to think fast to reach over and grab it, I was holding him by the ankles so he didn't fall in, it was pretty funny. For Christmas that year I bought him a floating gaff.