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.
My brother told me aliens and monsters lived under the bed.then the next morning I stuck my led off and hit the dog's leg and thought it was a monster's leg.from then on i would crawl to the end of the bed and take a flying leap out of my room :D