You shouldn't hit your friend's pets.
Billy is going on a business trip and asks Sam to watch his new dog, that has a tendency to jump on people.
Sam wants the dog to stop jumping on him.
"Sam trains the dog to stop jumping on people by saying ""No!"" loudly every time it jumps and giving it treats for listening."
Sam smacks the dog every time it tries to jump on him.
The dog stops jumping on people and Billy is grateful to Sam for training the dog.
The dog becomes afraid of Sam and Billy stops asking Sam to watch the dog.