Just came home to find the cat, Monster, banging his head on the bedroom door in an attempt to get out. Immediately following each thump on the door I heard a meow that actually sounded more like a human "Ow". I wish I could get a decent recording because it's kind of eery and super creepy.
It's really too bad I can't trust him to stay off the counters and Sweetie to stay out of the litter box when I'm gone. If they'd behave, I wouldn't have to put them on "lock down" so much.