Do you like watching people have the crap scared out of them? That's not really a question. Everyone loves that.
To slake your thirst for others' suffering, Grona Lund theme park in Stockholm set up an elaborate Halloween prank for its haunted house attraction, “House of Nightmares”. Right in the center of the city, the otherwise blank white poster reads: “Do You Dare Look At Our New Attraction?” Which, on first glance, should be scary for a theme park if it paid an advertising firm to come up with that lame line.
But when you get closer to the poster to scan the QR code, a screaming figure from INSIDE the poster lunges forward with outstretched hands and a screaming mouth. Small children and old people then scurry off at varying degrees of speed and fright.