In the movie Ouija, there’s a scene where we see a character flossing her teeth in front of a bathroom mirror, and she’s using regular dental floss; and then an angry spirit makes her levitate off the floor and smashes her head into the sink, killing her.
So in this joke ad for GUM Flossers, we’d see someone flossing with regular dental floss, when a ghost would grab them and kill them. Then the announcer would say: “Look what happens to people who use regular dental floss: they are always killed horribly! Use GUM Flossers, and stay healthy; and keep especially healthy gums, too!”
