Knocking and Scattered Utensils in a Village Banya After Midnight

I used to go to my grandma's in the village in the summer back in my school days, to relax, I was constantly messing around in the garden and doing all sorts of chores, so the banya was heated almost every day, and just after a workday, chilling in a hot banya is pure bliss.
So, over almost a month of living at my grandma's, I probably heated the banya about 10 times, and I noticed this interesting thing: when I was going to wash right around night, like 11-12 o'clock, my grandma would always give me something to sip, either a tincture, or sometimes a bit of vodka, and I wasn't against it, especially since I was a kid and getting gifts like that. Anyway, every time I was always under the influence, slightly drunk, but on my last trip to the banya I just took 0.5 of homebrew and didn't drink it, I was exhausted overall and forgot about it, it's already close to 12, and some unknown fuckery starts happening, I'm sitting there finishing washing, I start hearing someone knocking on the iron stove, like from inside, sounds like knocking with some piece of metal, knock-knock, not rhythmic knocking, but all over the place, sometimes fast fast, sometimes slow, right after that I started hearing knocking above the ceiling of the banya, like someone stomping with a little foot, and the sound was moving around the whole perimeter of the banya, I got scared shitless, because I thought I just got carbon monoxide poisoning, and if I stayed there a few more minutes I'd be done for, I quickly poured the rest of the basin of water over myself, run out into the changing room, and all my clothes are covered in soot, fucking hell, like someone ran their finger along the inside of the stove and wiped it on my shirt, underwear and shorts, I quickly opened the door in the changing room that led outside so fresh air would come in, threw on those filthy clothes, without even drying off, and when I already left the banya and was closing the door, I heard the basins and the ladle go flying around the banya, and something clanged against the window leading directly into the steam room. It was scary as hell even to glance into the window of the banya for a second, I quickly walked to the house without turning around, went around to the entrance, stood there, breathed some fresh air, at that point I'd already lost the thought that it was hallucinations, I seemed to have breathed it out and calmed down, went into the house, grandma was already asleep, I barely fell asleep myself, only by morning, I was still shaking.

The next morning the first thing she noticed was that my clothes were covered in soot, then at breakfast, I tell her how it is, she says, so you didn't drink anything? I say, what does that have to do with it? She says, well, at 12 o'clock at night the bannik with the devils wash there, if you'd been drunk, they wouldn't have touched you, because supposedly they feed on the aura of drunks, drug addicts, etc. and they kind of enjoy it, I sat there with a frog's face, listening to this, but didn't say anything, because I have no fucking clue how to argue with that, while I sat and ate breakfast in a t-shirt and shorts that had soot marks from the stove on them. After breakfast I looked into the banya, and as I expected, everything that flew around last night before I left was still lying on the floor, and one basin even had a hole in it, like someone had punched it through with a hammer. I cleaned all that up, grandma later said I got off easy, but after that, I only went to wash when it was light out, and with the door to the changing room open, because I was scared shitless, and grandma was cracking up and saying there was nothing to be afraid of.