So, in case you've ever wondered- it's not a good idea to finish up a thriller about a psychotic serial killer at 10 PM when the only light on in the house is the lamp you're using in the living room. Then, don't walk into the dark kitchen and wonder why that frog sounds so darn loud. But especially, don't turn around to find the back door ajar. Because it might scare the bejeebers out of you.
(I naturally decided Boomer needed to go out to pee, so I woke him up. He checked the perimeter for me, plus found a missing ball. All's well.)