We had one on a DD I was on.
The GM 1st class put a 50 gallon empty barrel over the side to shoot at.
Being a new Chief at the time(5'8", 160 lbs), he said go ahead, shoot at the barrel.
I was standing on the fantail and pulled the trigger....
Next thing the big GM is holding me up behind me laughing and said you can stop touching the trigger now.......