"I'm dead to you."

The little dog in this video appears to be suffering from Multiple Personality Disorder. One of his personas is a big-talking tough guy, fiercely loyal to his owner and ready to bite the head off of anyone who dares to approach him. The other personality is deceased. For some unexplained reason, that dog only appears when the guy dressed in overalls picks the dog up, and stays present until he puts the little guy back in his favorite chair. Then the yipey, growling badass returns. His condition would be sad, if it wasn't so funny.

Sources: Tastefully Offensive