There was this man that had a dog. He came home one day, and his dog was belly¹ up with its legs sticking in the air.
      
      He wasn't sure if it was dead or not, so he took it to the vet². He told the vet of his problem, and the vet said that there was a sure-fire way to see if the dog is indeed dead.
      
      He left the room and returned with a cat. He rubbed the cat in the dogs face, and after a while came to the conclusion that the dog was indeed dead.
      
      The man was upset and asked the doctor how much he owed him. The doctor said, "$550" The man was stunned³. He asked the doctor to explain and the doctor said, "Fifty for the visit, and 500 for the cat-scan..."