They pick up the phone and call. Even tells Venkman what happened and he instructs the kids to meet the Ghostbusters at the Patterson house. Once there, the Ghostbusters and the kids begin searching the house. They’re beset by a ghostly dog then an entire swarm of ghosts, but when their proton packs have no effect Venkman tells the Ghostbusters their enemies aren’t real. They’re holograms created by a scientist named Simon Scarey, who only made the house seem haunted as a prank.