5:30am and strange noises!

I awoke this morning with some strange sounds!  It was a bit scary, so I was really quite listening, grabbed my mace, and turned on lights.  Nothing.  I couldn't find a damn thing.  Then, I hear a very quiet "Meow".  Kwasie, my cat, had somehow got locked into the spare bedroom!  How the heck that happened - I have no clue.  Poor baby!  We promptly got some food, and went back to bed.