Leave it to Miller to scare the hell out of us. We looked up last night and couldn't find him anywhere. He's prone to somehow unlocking and getting out the front door. Given the rain yesterday, however, we knew he wouldn't be outside. Turns out he'd scaled the gate at the bottom of the stairs and made his way upstairs. I found him on his sister's princess bed, snuggled up under her blankets watching cartoons on an iPad.
I suppose it could have been much worse. With this little guy in particular, you just never know.