I am totally creeped out right now!

Last night I was standing in my kitchen talking to Ashley (who was sitting on the couch) and I was just sort of gazing absentmindedly out the window over her shoulder. I then noticed a faint glow as if from the end of a lit cigarette. It was then that I realized that I was looking directly into the face of some creep looking in our window! Granted, we ARE on the ground floor but this person was probably only about 4 feet away from the window, looking directly at me. And I was looking DIRECTLY AT HIM! And he DIDN'T MOVE!!! Ashley went out on the deck to have a smoke/yell at him. I could hear her talking to someone so I poked my head out the patio door and asked if he was still there and she said "yeah, he's right there pretending he can't hear me". When she turned back he wasn't there anymore and neither of us heard or saw him move. It was so weird! So either he is a) a pervert, b) a potential burglar or c) a vampire. It's really sad when you're hoping it's just a pervert! (We threw in the "vampire" because he didn't care AT ALL that we saw him and disappeared quickly and silently.) What's really weird is that we have no idea if he's done this before or how many times. What would possess a person to just be chillin', staring in our window? There's nothing back there but woods so there's no reason whatsoever to be back there (especially at 1am) unless you are a scary weirdo.

So here's the plan if he comes back:
Option A - take a photo of our peeper.
Option B - make like we didn't see him and call the police.