The first day
One day George came home from work. Much to his surprise, his best friend, Crosby, was not waiting for him in the hall. George sprinted through the house without taking off his coat, something was very wrong here! Normally when he came home every day he was welcomed by a very enthusiastic dog.
When George arrived in the living room, he saw Crosby sitting there, dead still, staring at the wall. George called his dog, overjoyed that he was okay. There was no reaction from the animal. In astonishment, George called again, but again the dog did not respond.
George decided to crouch next to his friend and look at the wall as well.