Since I can’t find the legendary USC film school short from 1971 “Judson’s Release” by Terence H. Winkless (which is a much better representation of this infamous urban legend), I’ll have to provide this clip instead from the 1980 film “When a Stranger Calls.”  Granted, this is a VERY effective opening to a film.  It’s so good that the rest of the film doesn’t compare to the first 25 minutes.  But if you’ve ever been a babysitter … or hired one at some point … this is one of the scariest things you’ll ever see.