Hey look, I'm doing this ON friday.
Skunks. We had 'em in Berkeley. My dad came out into the living room one evening. He had been lying down and saw a black tail go by. Thought it was our cat, took a second look and decided to quietly leave the room!! The skunk finally left the house w/o making a stink, thank you, but AFTER taking a nap. I kid you not, that skunk found a nice spot in the hallway, curled up and took a little snooze.
Our bathroom had windows floor to ceiling. We left the bottom window open for the cat. Thats how the skunk got in and out too.