Late one evening, I was reading some interesting article online when I heard a rustling sound in a corner of my room. I couldn’t see anything moving, convinced myself I had imagined it or it was something outside, and continued reading.
The sound repeated.
I suspected some pieces of paper that I had placed on sloped surfaces could have shifted, but I got more and more nervous when I heard the sound several times more. There have been mice in our walls. Could one of them have gotten into my room?
I stepped over to the suspicious corner and stood there waiting for the sound, but nothing happened. Oh right, of course, a mouse would hide when someone approached it.
Confirming my theory, the sound only repeated after I had returned to my desk. Oh, no, oh no, there’s a mouse in my room! It’s going to eat all my books! What do I do?!
Long story short, that article I was reading was designed to look like a multi-page booklet, and “turning a page” made a rustling sound effect that was emitted by the speaker I have in that corner of the room.