I have a couple from Basic (Great Lakes).
1st story:
One was, I was doing forward watch duty. I kept hearing sounds in the head like there was someone in it––movement, and then flushing sounds. This was probably maybe 45 minutes after lights-out, so no one should have been out of their rack. So, I go to investigate who's up.
I go in there, no one is near the sinks or the toilets––all the toilet areas are on-spot. No one is in the laundry area. No one is in the shower area, either. I go to do one more pass, to really make sure no one is hiding in there. I'm checking all the toilets again to make sure they're all squared away, and I hear a sound like the sink is on.
So, I come around, expecting to see a shipmate. There's no one there, but it looks like water is coming out of the tap and splashing onto the deck. So, I went to it to try and clean it up, but as I got closer I bent down to touch the water that was on the deck, and it was bone dry. The "water" that had been coming out of the faucet? Non-existent, and the faucet was turned all the way off.
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2nd Story:
I was in a holding unit since I failed my final run qual.
Me and another shipmate were pulling watch duty one morning. We had two heads that we were using. My duties included securing the head assigned to FIT, and hers was to secure the head assigned to the group in holding for various other reasons (educational qualifications. I forget the group's name).
Anyway, my shipmate goes to do a walk-through of the head, leaving me in charge of the barracks.
Not five minutes goes by, and she comes back in and tells me that she had gone in there, hearing the sound of a shower on. It was 2am, and there should have been no reason for anyone to be in the shower.
So, she went in there to find out who it was and same like my above story. No one was there, but the shower looked like it was on and water was coming out of it. But, when she stuck her arm in to turn the water off, she noticed that the "water" coming out was non-existent, and the floor that had looked wet was dry.
We also had all kind of other weird things happen. Usually, around 4am we sometimes would go to do our final rounds, and the racks that had been fine a moment ago, were suddenly off spot, and towels and guard belts had been moved around.