One has to watch for black holes, they can appear at any time, especially around cats. They have complete control of that kind of stuff.

They are good at hiding.

They know they can push our buttons.

I'm convinced they can be sitting in front of us and can't be seen if they don't want to be.

Is it time for a bell? I find the quietest bell I can, but found it wonderful to know where she was. Saved me from stepping on her a few times...

One of mine got hid/lost once. Could not find her anywhere, then I heard a tiny meow come from inside my recliner. Apparently there was room for her inside, and when I got out and de-reclined it she was trapped. She was lucky she wasn't injured.

My cats can jump from the floor to the top of my washer, to a shelf, and from there they can get in the floor between the main floor and basement. That is where they go when they hear the garage door open or the doorbell ring.