The plain white ad, human size, invites people to stand close and scan the QR code to have a preview of the horror that awaits in the theme park. But the Preview, the horror does not appear on their phone but the poster comes alive, scaring be juices out of everyone.
I think the ad gained more than what it did on the street it was planted.
You can read more about the theme park here. The House of Nightmares is set to open in April 2015.