In order to tease a scary attraction that's coming soon to Gröna Lund in 2015, this amusement park promotional poster delivers a taste of just how scary the ride will be.
The 'Haunted Poster' is set up to prominently feature a large QR code, challenging people passing by to scan it for a sneak peek at the scary new attraction, if they dare. While people are focused on their phones, which displays the message "Boo!" they are really scared by a person inside the poster, who jumps out at them from behind the soft cloth of the poster. To make people really jump out of their skin, the poster also includes a sharp, scary sound to make the experience truly terrifying.