They don't always come back.

Cut off the head and encase it in a block of lucite, after burning the body to ash and scattering it in one ounce lots in random postal codes around the globe. Ain't much coming back after that.

Then again, if I had kids, and they had a monster under the bed, I'd probably use it as an excuse for room clearing practice. And if I was far enough out not to scare the neighbors and had a couple of blanks laying around....