A sleeping prank victim is much easier to deal with than an awake one. They can't prevent the prank, and afterwards are usually too disoriented to respond violently with any effectiveness. This video will show you several pranks to play on sleeping victims, some of which you've probably seen before and a couple we're betting you haven't.
A highlight is putting peanut butter in a dog's mouth and then on the ear of your sleeping victim. Aren't dogs cute?