If you do XYZ , it could end miserably with your body decorating the gutter by sundown.
I looked up the use of decorating on Ngrams and Google and found nothing of the kind. This usage appears to be rather uncommon.
Am I mistaken in using this expression to describe the cynical thoughts of someone who is not optimistic about another person's chances of survival in trying times? Is there perhaps a more idiomatic equivalent?