LOL..
It was a sound I never heard before.
Remember "Bringing up Baby" with Katheryn Hepburn.
There is a scene where she throws gravel up against a window.. That's what it first sounded like.. Then it sounded like something scurrying...
My hackles were up. The girls kept cocking their heads.
Did I ever feel like a doofus.
Me too, but NOT until I knew what the sound was. And I knew I wasn't crazy cuz the cats heard too. LOL!