T he story of the babysitter and the clown statue is one of the most popular urban legends of all time. But what’s even more terrifying is the person behind the clown makeup. Serial killer John Waye Gacy (left). Gacy dressed as “Pogo the Clown” (right). | Historic Mysteries Did one of the most prolific serial killers of all time give us a reason to forever fear clowns? Let’s begin with a quick retelling of the urban myth about the babysitter and the clown statue. This story is best told by your cool big sister — but let us give it a shot. The legend goes like this: A married couple asks a babysitter to look after their kids so they can go out to dinner. They ask the babysitter to stay in the guest room upstairs while they’re gone, just in case one of the kids wakes up. Halfway through dinner, the couple calls the babysitter to check in. The sitter says everything is fine, but is it okay if she covers up the clown statue in the guest room with a sheet or a blanke...