the end of the world is an event that takes place in a hotel room. the event in question is the only gesture not allowed while doing the exhibition. 

a few days prior to the exhibition, a professional photographer has been hired, a nail has been hammered, a picture has been taken. the nail has been removed, the hole filled and painted new. what remains from the event is the image. 

the image is exhibited in the room with all the furnitures and accessories along with a hammer, and a nail.