Was sitting on the old fishboard wharf in Bundy many moons ago with a handline in the water. Handline starts spinning around, dancing all over the place.
I pulled it in. Fair weight, but no fight.......
I pulled up a 5 Kg rock.
I must have pulled the hook from the fish's mouth, and straight into an oyster shell on the rock that the fish happened to be passing at the time.
The rock was released unharmed.