That is so true! I drink tall boy beers and they're notorious for that happening. So I've gotten into the habit of moving them beyond arm's reach, to where it can't. Spilled beer IS something to cry about. π
This is why I always put my drink in the same place while on my laptop. I'm much less likely to knock it over if it's always in the same spot. My subconscious speaks...
When I had a desktop, I accidentally spilled some coffee onto the keyboard one day, rendering it inoperable. Luckily, I had another, older one to fall back on. That was a quick fix.
I ruined a laptop a few years ago. A bat flew into my living room where I was on my laptop. Okay, I freaked a bit and when I stood up in a hurry, I knocked my Coke over and it spilled on my keyboard. It became "Rest in Peace" to my laptop. π
All I can say is that the entire event was completely weird.
Yeah, bat experiences are unusual. I've had a couple. One was where I had to help a buddy get rid of one that had somehow gotten in the bedroom of where his baby's crib was located. We were adamant about getting that thing out of there.
The weirdest thing about that night was that up until then, I'd never had a "bat experience." Earlier that evening, I was at a neighbor's house and the folks there somehow got onto the subject of their experiences with them. An hour or so later, back at home, a bat flies into my living room! THAT'S what really freaked my out. Of all the times for this to happen!
Luckily, I was smart enough to shut a couple of doors and confine the bat to the front two rooms of my house. Then I stepped out the side door, went around to the front of the house and propped open the front door. A few minutes later I witnessed the bat flying out into the night sky (this happened at about 2am). Whew.
I soon discovered that the bat had entered down through the chimney, into the wood pellet stove in the basement, and then up into the living room. I have since blocked off the chimney because I don't use the wood stove.
Another experience I had was almost exactly like the one you just described. I discovered it in my widowed mother's basement one day when I had to go down there for something. The thing seemed to come out of nowhere (as you know), screeching and flapping its wings, and startled the hell out of me. And yes, I also discovered it had gotten there, via the chimney. And I also implemented the same strategy you did, that was, to cut off certain avenues of escape and to create the one I did. Then, I just sat and waited in mom's dark kitchen for a bit. Sure enough, it came up that basement stairway and out the open back door, just like I wanted it to.