My boat was driven up on the shore in a storm by the waves. I tried to disconnect the battery that was totally submerged in salt water. It lit me up so bad, I just let it be. I’ve been shocked a lot before, but nothing like that.
The worst shock I have ever had was from an old Vivitar electronic flash. The battery had gotten weak and I took it apart to see if I could replace it.
The next thing I knew, the flash had been thrown against a wall and destroyed. I later read that they are potentially very dangerous.