I had such a weird experience today. My pill holder (the type with 7 sections, one for each day of the week) needed to be refilled and so I opened all the days and I put a few pills in and then my finger seemed to be wet, then I saw that one of the days had a bit of water in it and the pill was dissolving. It didn't seem possible for that to be! I looked for a leak in the ceiling but there was none. Then I opened the kitchen cabinet that was above my pill holder, and bizarrely the paper towels I had under the dishes on the lowest shelf were wet. The upper shelves were dry.
There is no water source inside the kitchen cabinet. I felt like I was in some crazy universe. I removed the wet paper towels and got a flashlight and used paper towels to feel all around in it and it was all dry.
I would have remained mystified forever, but luckily while looking all over the apartment for any kind of leak or wet areas, I found the carpet in the back of the entry closet was wet. So, that made me feel sufficiently not-crazy to call maintenance. They came and were equally mystified about the source of the water, but when they called whoever they needed to call to request cleanup/restoration people, they learned that in the middle of the night last night, three floors above me, someone's refrigerator had a bad leak.
So they told me the water must have traveled down inside the walls and then come to a fire-stop or something and then come out at random places in my apartment. It totally skipped the floor above me! If there hadn't been the few drops inside my pill holder, I'm not sure I'd have ever noticed.
Now I am waiting for the restoration people to show up with the gosh-awful-noisy fans.