LOL! The water brakes!
On my first deployment, first day out of port, I was exploring the ship, and was all the way forward, on the level right under the flight deck, when they fired a cat shot. I had never experienced it before, and it scared the bejeezus out of me!
Yep, I got to where I would fall asleep between cat shots and would never hear another until I woke up 8 hours later.