I did this the other weekend.except replace "monsters" with "zombies." Someone was shooting off and I thought, "What if those are rifles? What if it's zombies?" This is why I choose not to watch scary movies! :) I've got "scary" covered.
"Oh I'll wake up and wash/blow dry/straighten my hair" . "I'll wake up early to shave my legs" . "If I go to bed now, I'll wake up early to finish this homework" . Alarm goes off: "Oh well, maybe I'll wake up early tomorrow to do it"