Funny Video from Petsami

I've watched this video a few times in the past and just find it hilarious.  In this video from Petsami on Youtube, a kid goes to retrieve a ball that is over in another yard. Problem is, in order to get the ball, he has to climb over a fence and get past a dog. What will happen when he gets over the fence?  What will the dog do to him?  I'm sure you'll be surprised just as I was. :)

Credit: Petsami from youtube.com