I was a guest in Rocko's house. This was a storage room/spare bedroom. When this video was made, I had known him for about 3 days. Minutes before this video, he jumped on the bed and stepped squarely right on my pee pee place.
The reason why he left the room is because the other German Shepherd upstairs barked once. I figured he was telling Rocko to stop his incessant barking. And it worked.