Ever since the plaster got cleaned out of the front porch ceiling, I've been hearing mysterious thundering from above while I work during the day in the office downstairs. Come to think of it, it sounds awfully like one small and yet mysteriously dense cat jumping back and forth on the the loose plywood pathway over to the construction side, where she is very definitely Not Allowed. But she's always sitting innocently on the bed when I go up to check on her, or she comes down to twine around my legs and look cute before I can get up there.
I'd given up catching her in the act, so to speak, until one day I heard her howling miserably like she does when she's gotten stuck somewhere. I grabbed the camera and went upstairs and lo! Finally, proof! One small Cat, being quite Bad.
And yes, she was howling because she'd gone over there to sit and had somehow immediately forgotten how to get back. Even though she'd been running back and forth for a week. I did not rescue her. She howled for about fifteen minutes, then got up and figured it out as soon as she heard me in the kitchen downstairs, preparing food that she was convinced might be for her, despite years of evidence otherwise.